An estimated ** million households in the United States owned at least one dog according to a 2024/25 pet owners survey, making them the most widely owned type of pet across the U.S. at this time. Cats and freshwater fish ranked in second and third places, with around ** million and ** million households owning such pets, respectively. Freshwater vs. salt water fish Freshwater fish spend most or all their lives in fresh water. Fresh water’s main difference to salt water is the level of salinity. Freshwater fish have a range of physiological adaptations to enable them to live in such conditions. As the statistic makes clear, Americans keep a large number of freshwater aquatic species at home as pets. American pet owners In 2023, around ** percent of all households in the United States owned a pet. This is a decrease from 2020, but still around a ** percent increase from 1988. It is no surprise that as more and more households own pets, pet industry expenditure has also witnessed steady growth. Expenditure reached over *** billion U.S. dollars in 2022, almost a sixfold increase from 1998. The majority of pet product sales are still made in brick-and-mortar stores, despite the rise and evolution of e-commerce in the United States.

The statistic illustrates the number of freshwater fish owned by households in the United States from 2000 to 2017/2018. In 2017/2018, about 139.3 million freshwater fish were owned by American households. Thus, freshwater fish made up the most popular pet category in the United States, based on the total number.

According to a 2017 survey, Millennial males in the United States were more likely to be cat and/or dog owners than their female counterparts. Some ** percent of male Millennial survey respondents stated that they owned a cat and ** percent owned a dog. In comparison, ** and ** percent of female respondents were cat and/or dog owners, respectively.

Pet ownership rates in the United States

In 2019, ** percent of all households in the United States owned a pet . This is over a *** percent increase from 1988. Almost ** percent of surveyed American pet-owning households had a dog in 2017 , making it the most popular type of pet to own in the United States. Cats and freshwater fish were the second and third most popular type of pet, with a ** and ** percent share of the vote respectively.

Number of pets owned

Freshwater fish were the most kept pet in the United States in 2017/18 in terms of volume. In total, Americans were estimated to own approximately ***** million of the aquatic animals in that year. This large volume is no surprise when considering their small size and minor cost increases when owning more than one fish as a pet. Cats and dogs were the second and third most owned pets, with around **** and **** million living in U.S. households respectively.

********* percent of households in the United States owned one or more pets in 2023/2024. Household penetration rates for pet-ownership have increased by ** percent since the beginning of the survey period in 1988. What kinds of pets do Americans prefer? There were estimated to be around ** million dog-owning households in the United States according to a recent survey, making dogs the most popular kind of pets in American homes. Cats and freshwater fish ranked in second and third places, respectively. Horses and saltwater fish were the least popular types of animals to keep, with around *** million households owning each type of pet. How much do Americans spend on their pets? Total pet industry expenditure reached around ***** billion U.S. dollars in 2022, an increase from the previous year. As well as regular expenses such as food and vet costs, households were estimated to spend around *** billion U.S. dollars on Valentine's Day gifts for their pets in 2023.

Snapshot img

Ornamental Fish Market Size 2024-2028

The ornamental fish market size is estimated to grow by USD 4.5 billion at a CAGR of 8.33% between 2023 and 2028. Ornamental fish-keeping has gained significant popularity as a hobby due to the tranquility and aesthetic value it brings to homes and public spaces. The availability of a diverse range of ornamental fish varieties, each with unique colors, patterns, and behaviors, adds to the hobby's allure. These fish species not only serve as decorative elements but also hold cultural significance in various communities around the world. For instance, in Chinese culture, Koi fish symbolize prosperity and good fortune, while Angelfish are revered in South America for their association with ancient mythology. As a result, ornamental fish-keeping not only offers an enjoyable pastime but also fosters an appreciation for aquatic biodiversity and cultural traditions.

What will be the Size of the Market During the Forecast Period?

For More Highlights About this Report, Request Free Sample

Market Dynamic and Customer Landscape

Ornamental fish market is a thriving industry that caters to the growing demand for decorative aquatic species as pets. With the increasing popularity among Millennials and Gen-Z population, the market is witnessing significant growth. Ornamental fish come in various species such as Tetras, Guppies, Mollies, Betta, and many more. These fish are not just pets but also offer psychological advantages, acting as stress reducers and providing home comfort. Aquarium types range from simple tanks to high-tech, automated systems, making them suitable for different interior decors and luxury lifestyles. Decorative aquarium fish like Siamese Fighting Fish, Guppy, Cory Catfish, and Zebra Danio are popular choices. Temperate and marine species like Triggerfish and Groupers are also gaining popularity among hobbyists. Cross breeding has led to the creation of unique and beautiful fish varieties. Pet webcams allow fish owners to monitor their pets from anywhere, adding to the convenience and enjoyment. Ornamental fish are not just pets but also serve as aesthetics, adding charm to homes and offices. The market is expected to continue its growth trajectory due to the increasing demand for these beautiful creatures. Our researchers analyzed the data with 2023 as the base year, along with the key drivers, trends, and challenges. A holistic analysis of drivers will help companies refine their marketing strategies to gain a competitive advantage.

Key Market Driver

The increasing interest in keeping ornamental fish is notably driving market growth. Ornamental fish have gained significant popularity among various demographics, particularly Millennials and Gen-Z population. These vibrant aquatic creatures offer numerous benefits, extending from psychological advantages to home comfort and stress reduction. Alzheimer's patients, for instance, have shown improvement in memory and cognitive function through interaction with pet webcams featuring Tetras, Guppies, Mollies, Betta, Goldfish, and other ornamental species. Reef aquariums and fish-only aquariums have become a luxury lifestyle choice for many, with high-quality aquarium equipment and eco-friendly practices increasingly accessible through online retailers and e-commerce platforms. Exotic aqua species, such as tropical freshwater Tetras, Guppies, and Mollies, add aesthetic value to interior decors, particularly in high-rise apartments. Cross breeding and sustainable aquaculture practices have led to the emergence of exotic ornamental fish species, catering to the growing hobbyist community. The ease of care and low-maintenance nature of these pets make them an ideal choice for those seeking companionship and stress relief without the commitment of traditional pets. Aquarium enthusiasts appreciate the diverse range of colours and the calming influence of their aquatic companions. Responsible breeding and certification programs ensure the ethical sourcing and sustainable practices of ornamental fish, making them a desirable and responsible pet ownership option. Overall, ornamental fish provide a unique blend of aesthetics, home comfort, and psychological benefits, making them a worthwhile investment for individuals seeking to enhance their living spaces and improve their wellbeing. Thus, such factors are driving the growth of the market during the forecast period.

Significant Market Trends

The growing trend of aqua-scaping is the key trend in the market. Ornamental fish have gained significant popularity among various demographics, particularly Millennials and Gen-Z population. The use of pet webcams allows Alzheimer's patients to engage with their aquatic pets, providing psychological advantages such as stress reduction and home comfort. Tetras, Guppies, Mollies, Betta, Goldfish, and various marine ornamental fish are popular choices for both fish-only aquariums and re

Snapshot img

Pet Sitting Market Size 2024-2028

The pet sitting market size is forecast to increase by USD 1.57 billion at a CAGR of 9.87% between 2023 and 2028. The market is experiencing significant growth due to several key factors. First, the rising trend of pet humanization has led to increased pet ownership and spending on pets. Pet types encompass a wide range, from small mammals and birds to freshwater fish, smart pet livestock, and exotic pets. As pet owners prioritize their pets' wellbeing, they seek professional pet sitting services for care visits during their absence. Service types include regular check-ins, feeding, administering medication, and playtime. Compliance with stringent regulations and certifications is essential for pet sitting businesses to ensure the highest level of care and safety for pets. These factors collectively contribute to the market's growth and ongoing demand for professional services.

Request Free Sample

The pet sitting market is thriving as more pet owners seek reliable care for their furry companions. With the return-to-work trend, many retired people and students are turning to pet sitting services to accommodate their busy lifestyles. This growing demand has led to increased spending of consumers on quality pet care. In particular, the pet care cost associated with hiring a service provider can vary, but it ensures pets are well cared for while owners travel or work. Furthermore, societal shifts in pet acceptance have made pets a central part of many households, leading to a rise in the need for professional care. Ultimately, the pet sitting market reflects the evolving relationship between humans and their animal companions, providing peace of mind for pet owners.

Market Segmentation

The market research report provides comprehensive data (region-wise segment analysis), with forecasts and estimates in 'USD billion' for 2024-2028, as well as historical data from 2018-2022 for the following segments.

Type

  Dogs
  Cats


Service

  Care visits
  Drop-in visits


Geography

  North America

    Canada
    US


  Europe

    Germany
    UK


  APAC

    China


  Middle East and Africa



  South America

By Type Insights

The dogs segment is estimated to witness significant growth during the forecast period. The market experiences significant growth due to the increasing popularity of dogs as pets and the resulting demand for pet care services. Dogs, the most commonly owned pets worldwide, are sought after for their ability to alleviate feelings of loneliness, reduce anxiety, stress, and depression, and promote physical activity and cardiovascular health. Additionally, dogs serve as valuable companions for children and the elderly, instilling responsibility, kindness, and empathy.

Additionally, pet owners require pet sitting services, including daycare visits and dog walking, when they are unable to be at home. Animal-borne disorders, such as abdominal pain and diarrhea, can necessitate the need for pet sitting services, further driving market growth. The rise of e-commerce platforms has also made it easier for pet owners to access a wide range of pet grooming products and services online, contributing to market expansion. Furthermore, legislation and regulations governing pet care and pet sitting services may vary by region, segmenting the market by pet type and location.

Get a glance at the market share of various segments Request Free Sample

The dogs segment was valued at USD 1.31 billion in 2018 and showed a gradual increase during the forecast period.

Regional Insights

North America is estimated to contribute 41% to the growth of the global market during the forecast period. Technavio's analysts have elaborately explained the regional trends and drivers that shape the market during the forecast period.

For more insights on the market share of various regions Request Free Sample

The market, a significant sector within the pet care industry, experiences substantial growth, particularly in North America. With the US, Canada, and Mexico leading the way, this region hosts the largest number of pets and pet-sitting services worldwide. Factors such as the affordability of these services and the availability of experienced, full-time providers contribute significantly to the market's expansion in North America.

Additionally, increasing awareness among pet owners regarding various pet sitting options, including daycare visits and dog walking, further fuels market growth. Animal-borne disorders like abdominal pain and diarrhea necessitate the need for professional pet care services, leading to increased demand for pet sitting. Legislation mandating proper care for pets during their owners' absences also supports the market's growth.

Our researchers analyzed the data with 2023 as the base year, along with the key drivers, trends, and challenges. A holistic analysis of

Surveyed dog owners in the United States stated that they spent, on average, 442 U.S. dollars on pet food per year in 2020. In comparison, cat-owning respondents claimed to spend an average of 329 U.S. dollars on pet food on an annual basis.

Pet ownership in the United States In 2019/20, dogs and cats were the most popular American household pets. There were approximately 63.4 million dog-owning households and 42.7 million cat-owning households in the United States. Other pets living in U.S. households included freshwater fish, saltwater fish, birds, reptiles, and horses. Due to the onset of the coronavirus pandemic in 2020 and the increased time spent at home, many Americans reported acquiring new pets. In a recent survey carried out in December 2020, 10 percent of respondents in the United States reported acquiring a new pet as a result of the coronavirus pandemic.

Pet expenditures in the United States As Americans increasingly acquired more and more pets over the years, pet industry expenditure in the United States increased at an impressive rate, growing by over 500 percent between 1994 and 2020. Pet food and treats captured the biggest share of pet industry sales, followed by veterinary services and related products. In terms of pet food, the dry dog food segment generated the highest amount of sales, with around 5.3 billion U.S. dollars generated in 2020.

Fish Oil Pet Supplement Market Outlook

According to our latest research, the global fish oil pet supplement market size reached USD 820 million in 2024. The market is expected to grow at a robust CAGR of 7.2% from 2025 to 2033, reaching an estimated USD 1.54 billion by 2033. The primary growth factor driving this expansion is the increasing awareness among pet owners regarding the health benefits of omega-3 fatty acids, particularly EPA and DHA, which are abundantly found in fish oil supplements. This trend is further bolstered by the rising trend of pet humanization, where pets are increasingly considered family members, prompting owners to invest in their well-being through high-quality nutritional supplements.

One of the most significant growth factors for the fish oil pet supplement market is the rising prevalence of chronic health conditions among companion animals, such as arthritis, skin disorders, and cardiovascular issues. Pet owners are becoming more proactive about preventive healthcare, seeking out supplements that can support joint health, skin and coat vitality, and immune system strength. The scientific evidence supporting the efficacy of fish oil in managing these conditions has led to a surge in demand for fish oil-based products. Additionally, veterinarians are increasingly recommending fish oil supplements as part of comprehensive wellness regimens for pets, further fueling market growth.

Another key driver is the expansion of distribution channels, particularly the rapid growth of online retail platforms. The convenience and accessibility of e-commerce have made it easier for pet owners to access a wide variety of fish oil supplements, compare brands, and read reviews before making a purchase. This shift has also enabled smaller and niche brands to reach a broader audience, intensifying competition and fostering innovation in product formulations, packaging, and marketing. As a result, consumers now have access to a diverse array of fish oil supplements tailored to specific pet needs, such as breed, age, and health condition.

Moreover, the increasing disposable income in emerging economies, coupled with urbanization and changing lifestyles, has led to higher rates of pet ownership and a greater willingness to spend on pet health and wellness. In markets such as Asia Pacific and Latin America, the adoption of westernized pet care practices is accelerating the uptake of premium pet supplements, including fish oil. Regulatory support for pet supplement safety and quality standards in developed regions is also contributing to consumer confidence and market growth, as pet owners seek assurance regarding the efficacy and safety of the products they purchase.

Regionally, North America continues to dominate the fish oil pet supplement market, accounting for the largest share due to high pet ownership rates, advanced veterinary healthcare infrastructure, and strong consumer awareness. Europe follows closely, with a well-established pet care industry and stringent regulatory frameworks that ensure product quality. Meanwhile, the Asia Pacific region is emerging as a lucrative market, driven by rapid urbanization, rising disposable incomes, and a growing cultural shift towards pet companionship. While Latin America and the Middle East & Africa currently represent smaller shares, they are poised for steady growth as pet care awareness and spending increase.

Product Type Analysis

The fish oil pet supplement market is segmented by product type into liquid, capsule, chewable, and powder forms. Liquid fish oil supplements remain the most popular choice among pet owners, owing to their versatility and ease of administration, especially for pets that are finicky eaters or have difficulty swallowing pills. Liquid formulations are often favored for their quick absorption and ability to be mixed seamlessly into pet food, ensuring consistent dosing and compliance. Manufacturers are focusing on improving the palatability of liquid supplements by incorporating natural flavors, which has further boosted their acceptance among pets and their owners.

Capsule-based fish oil supplements are gaining traction, particularly among pet owners who prioritize convenience and precise dosing. Capsules offer the advantage of masking the strong odor and taste of fish oil, making them suitable for pets that are sensitive to flavors. The encapsulation process also helps preserve

The global natural pet supplement market is experiencing robust growth, driven by increasing pet ownership, rising pet humanization, and a growing awareness of pet health and wellness among pet owners. The market, estimated at $15 billion in 2025, is projected to achieve a Compound Annual Growth Rate (CAGR) of 7% from 2025 to 2033, reaching an estimated $25 billion by 2033. This growth is fueled by several key factors. Firstly, the increasing preference for natural and organic pet products, coupled with concerns about potential side effects from synthetic supplements, is significantly boosting demand. Secondly, the expansion of e-commerce platforms and online pet product retailers has broadened market access and increased convenience for consumers. Finally, innovation in product formulation, including the development of specialized supplements addressing specific pet health needs (e.g., joint health, cognitive function, and allergy relief), continues to drive market expansion. Segment-wise, the dog segment currently holds the largest market share, followed by the cat segment. Within the types of supplements, vitamins and fish oil are the most popular choices due to their perceived health benefits, although herbal ointments are demonstrating promising growth, driven by increased interest in holistic pet care. Geographically, North America and Europe dominate the market, owing to high pet ownership rates and strong consumer spending power. However, Asia-Pacific is emerging as a high-growth region, fueled by rising disposable incomes and a growing middle class with increasing pet adoption rates. Challenges include maintaining consistent product quality and addressing concerns about ingredient sourcing and standardization within the industry. Furthermore, competition amongst numerous established players and newer entrants presents a hurdle. Despite these challenges, the future outlook for the natural pet supplement market remains positive, driven by ongoing consumer demand for premium and specialized pet care products.

In the United States, more than half of the population reported owning a pet in 2011. This number has been quite steady since then. Today there are more than 90 million cats in the United States, while the number of dogs is just below the 90 million-mark. Freshwater fish are the most common pet with almost 140 million nationwide in 2018, followed by the aforementioned cats and dogs.   Pet expenses    When it comes to expenses, fish are generally considered low maintenance compared to other pets. Dogs especially require high expense, particularly for kennel boarding while their owners are away. However, the highest costs for dog owners are due to surgical vet visits, reported at almost double the expense for cats in 2019. Lower life expectancy could be a factor - around 11 years for a medium-sized dog, compared with 12 to 15 years for cats.  
  Pet food  

Food is currently the largest expense for cat owners, and the second highest for dogs, not even including treats. Despite the convenience of buying pet food online, or while already grocery shopping in a supermarket, food store, or wholesale club, the highest share of pet food sales comes from pet specialty chains. With many owners are willing to make the extra trip for their pets, chain shops Pet Smart and PetCo make up almost half the market for pet companies in the United States.

According to a national pet owners survey, the number of birds owned as a pet by households in the United States reached 20.6 million in 2017. The number of pet birds has fluctuated over the past few years, hitting a low of 14.3 million in 2015.

Americans love their pets

Some 68 percent of all households in the United States owned at least one pet in 2017, this is an increase of over 10 percent since 1988. Freshwater fish were the most commonly owned pet in terms of volume in 2017 , followed by cats, dogs and birds. Pet ownership is, however, not evenly distributed between age groups - Americans aged between 18 and 29 were most likely to own a pet.

Industry leaders

PetSmart and PETCO, the American pet product retail chains, are the industry leaders within the North American pet market, with 1,656 and 1,482 pet stores respectively. PetSmart’s revenue reached approximately 5.32 billion U.S. dollars in the United States in the 2018/19 fiscal year ending on January 31.

The USA animal model market valuation reached around US$ 947.3 million back in 2022. The demand in the USA animal model is set to increase at a 4.3% CAGR from 2023 to 2033. The demand for animal models in the United States, in terms of value, is anticipated to reach US$ 1,487.9 million by 2033. According to a study by Future Market Insights, mice held a substantial share of over 61.03% in 2022 within the USA market.

Data Points	Market Insights
USA Animal Model Market Value (2022)	US$ 947.3 million
USA Animal Model Market Estimated Value (2023)	US$ 976.1 million
USA Animal Model Market Projected Value (2033)	US$ 1,487.9 million
USA Animal Model Market Value-based CAGR (2022 to 2032)	4.3%

Category-wise Insights

Category	By Species
Top Segment	Mice
Market Share in Percentage	61.03%

Category	By End-user Verticals
Top Segment	Academic & Research Institutes
Market Share in Percentage	37.21%

Report Scope as per USA Animal Model Industry Analysis

Attribute	Details
Forecast Period	2023 to 2033
Historical Data Available for	2017 to 2022
Market Analysis	US$ million or billion for Value
Key Countries Covered	The United States of America
Key Market Segments Covered	By Species, By Technology, By Applications, By Use and By End-user Verticals
Key Companies Profiled	Charles River Laboratories The Jackson Laboratory Taconic Biosciences, Inc. Genoway Envigo (Inotiv, Inc.) Marshall BioResources Janvier Labs Applied stem cells Biocytogen Transposagen Biopharmaceuticals, Inc. (Hera Bio Labs) Cyagen Ingenious targeting labs Crown Bioscience Inc. (JSR Corporation). Harbour Biomed Sinclair BioResources Alpha Genesis Inc. Creative Animodel DaVinci Biomedical Research Products, Inc
Report Coverage	Market Forecast, Company Share Analysis, Competition Intelligence, DROT Analysis, Market Dynamics and Challenges, and Strategic Growth Initiatives
Customization & Pricing	Available upon Request

According to a survey carried out in the United States in 2020, poultry was the most popular ingredient for both cat and dog owners to feed their pets. Beef ranked second amongst dog owners, while fish came in second place for cat owners.

******** was the largest pet specialty retail chain in North America as of March 2023 in terms of store count, with a total of ***** stores. The company provides a variety of animals for sale and adoption, such as dogs, cats, birds, fish and reptiles. Pet grooming services, dog training, and pet hotel and day care facilities are also part of the company’s growing portfolio. Petco was PetSmart’s closest competitor in terms of store locations in that year, with roughly ***** stores across North America. The pet store industry The pet store industry continues to grow despite increased competition from supermarkets, mass merchandisers and online retailers which offer consumers more convenience at lower prices. By 2025, the U.S. pet store industry is expected to generate approximately ***** billion U.S. dollars in revenue, an increase of around two billion since 2020. PetSmart vs. Petco The largest pet supply companies in the United States are without a doubt PetSmart and Petco Animal Supplies. PetSmart, which is headquartered in Phoenix, Arizona, brings revenue in from brick-and-mortar stores across the U.S., as well as in Canada and Puerto Rico. In the financial year of 2020/21, the company generated close to ***** billion U.S. dollars in revenue, an increase of over *** million compared to the previous fiscal year. On the other hand, Petco, which mainly operates in the U.S., Puerto Rico, and Mexico, brought in roughly ***** billion U.S. dollars' worth of revenue in 2020/21.

BASE YEAR	2024
HISTORICAL DATA	2019 - 2024
REPORT COVERAGE	Revenue Forecast, Competitive Landscape, Growth Factors, and Trends
MARKET SIZE 2023	1.84(USD Billion)
MARKET SIZE 2024	1.9(USD Billion)
MARKET SIZE 2032	2.5(USD Billion)
SEGMENTS COVERED	Type ,Size ,Color ,Regional
COUNTRIES COVERED	North America, Europe, APAC, South America, MEA
KEY MARKET DYNAMICS	Rising demand for ornamental fish Increasing popularity of goldfish as pets Growing disposable income in emerging economies Technological advancements in fishkeeping Expansion of retail channels for goldfish
MARKET FORECAST UNITS	USD Billion
KEY COMPANIES PROFILED	Fancy Goldfish Inc. ,Hikari ,Wardley ,PondCare Company Ltd. ,Aqueon ,Kazoo Pet Products ,Tetra ,Omega Sea Ltd. ,Zoo Med Laboratories Inc. ,Rolf C. Hagen Inc. ,Hikari Sales USA, Inc. ,Clearview ,San Francisco Bay Brand
MARKET FORECAST PERIOD	2024 - 2032
KEY MARKET OPPORTUNITIES	Online marketplace expansion Growing demand for decorative fish Aquarium hobbyist base expansion Smart aquarium technology advancements Pet industry growth
COMPOUND ANNUAL GROWTH RATE (CAGR)	3.49% (2024 - 2032)

PetSmart was the largest pet specialty retail chain in North America as of March 2023 in terms of store count, with a total of 1,665 stores. The company provides a variety of animals for sale and adoption, such as dogs, cats, birds, fish and reptiles. Pet grooming services, dog training, and pet hotel and day care facilities are also part of the company’s growing portfolio. Petco was PetSmart’s closest competitor in terms of store locations in that year, with roughly 1,500 stores across North America. The pet store industry The pet store industry continues to grow despite increased competition from supermarkets, mass merchandisers and online retailers which offer consumers more convenience at lower prices. By 2025, the U.S. pet store industry is expected to generate approximately 22.87 billion U.S. dollars in revenue, an increase of around two billion since 2020. PetSmart vs. Petco The largest pet supply companies in the United States are without a doubt PetSmart and Petco Animal Supplies. PetSmart, which is headquartered in Phoenix, Arizona, brings revenue in from brick-and-mortar stores across the U.S., as well as in Canada and Puerto Rico. In the financial year of 2020/21, the company generated close to seven billion U.S. dollars in revenue, an increase of over 350 million compared to the previous fiscal year. On the other hand, Petco, which mainly operates in the U.S., Puerto Rico, and Mexico, brought in roughly three billion U.S. dollars' worth of revenue in 2020/21.

Despite animal testing being a controversial topic for many years, it is still widely used globally to assess the safety of products and test the efficacy of new treatments and products. In 2020, the United States was the world’s largest user of animals in research and testing, with around 20 million animals used research and testing, followed by China where it is estimated that around 16 million animals were used in research and testing in that year. Animal testing is used especially in the medical, cosmetic, and chemical industries.

Animal Testing in the EU

The European Union also reported some 9.4 million animals used research and testing as of 2020. Basic research, and translational and applied research are the two leading purposes of animal testing in the European Union. Mice represent the most commonly used animal in research and testing in the EU, representing almost half of all animals used in research and testing, followed by fish and rats.

Animal Testing in Great Britain

Animal testing in Great Britain was most common in basic scientific research on the nervous system and the immune system, and most procedures on animals for scientific experiments in that year in Great Britain were conducted by universities and medical schools. As in the EU, mice were the most commonly used animals in research and testing, followed by domestic fowl and rats.