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A pet store or pet shop is a retail business which sells different kinds of animals to the public. A variety of animal supplies and pet accessories are also sold in pet shops. The products sold include: food, treats, toys, collars, leashes, cat litter, cages and aquariums. Some pet stores provide engraving services for pet tags, which have the owner’s contact information in case the pet gets lost.
In the USA and Canada, pet shops often offer both hygienic care (such as pet cleaning) and esthetic services (such as cat and dog grooming). Grooming is the process by which a dog or cats's physical appearance is enhanced and kept according to breed standards for competitive breed showing, for other types of competition, like creative grooming or pet tuning contests, or just to their owners taste. Some pet stores also provide tips on training and behaviour, as well as advice on pet nutrition.
There are many large pet stores located in the US and Canada, including: Petland, Pet Valu, and PetSmart. In the United States, Petco is also a popular pet store. In addition, there are many smaller pet shops that aren't part of big chains, such as Big Al’s, which have a smaller number of locations.
Pet stores are extremely popular in today’s society. In 2004, according to the American Pet Products Manufacturers Association, in the pet industry, live animal sales reached approximately $1.6 billion. Moreover, in a 2003 survey in the US, merely 38% of U.S. pet shops claimed that they did not sell any live animals.
Pet stores commonly sell
- Fish for home aquariums,
- Small birds such as Parakeets and Cockatiels,
- Fancy rats,
- Guinea pigs,
- Fresh water turtles,
Less common in pet stores are larger mammals such as dogs and cats. In the UK and a large number of other European countries, dogs and cats are not sold at pet stores. Exotic pets such as Sugar Gliders, large snakes, hedgehogs, Brazilian short-tailed opossums, and large parrots are available at some pet shops. Because the care of these types of animals is difficult and expensive, these are most often carried only in stores that specialize in exotic animals.
Animals in pet stores are often considered to be commodities, instead of beings that need proper care and attention.
A major concern with pet stores and the reason why puppies and kittens may not be sold in certain stores anymore is largely due to puppy mills. Puppy mills are a place where un-reputable breeders breed dogs in horrendous conditions simply for monetary gain. According to the Puppy Mill Project “more than 2.5 million puppies are born in puppy mills each year in this country.”  Kitten mills are not as widely known as puppy mills, but they still do exist. The animals in these mills are kept in tiny, unsanitary cages, receive little to no nourishment, and often receive no veterinary care. Some cities in Canada, such as Toronto, have altogether banned the sale of cats and dogs in pet stores in order to put an end to this animal abuse. 
Due to this practice, many pet shops have stopped selling cats and dogs in an effort to end puppy and kitten mills. Consumers can help put an end to this as well, by boycotting pet stores that continue to sell animals that come from puppy and kitten mills, and instead by visiting their local humane society to adopt their pet.
In Canada and the US, another area of concern regarding pet stores is the laws that guide pet stores. In the US, there are no federal laws in place that protect animals in retail pet stores. There are state laws to protect animals, however they all vary and some are not sufficient enough. In twenty states plus D.C., a license is required before being able to manage a pet store. The welfare of animals in pet shops also relies heavily on the veterinary care available to them. In the United States, there are only 16 states that enforce veterinary care laws in pet stores.  In Ontario, Canada the Provincial Animal Welfare Act states that the Ontario Society for the Prevention of Cruelty to Animals has the authorization to examine places where animals are kept for sale, including pet shops. 
In computer science
In computer science, a "pet store program" is an example of how to use a particular software framework or set of libraries to build a real program. Its concept is similar to the Hello world program. It has been made popular by Sun Microsystems for illustrating Java EE, and many other vendors followed.
- "Ten Fast Facts about Pet Shops". Retrieved 3 April 2014.
- "The Truth About Puppy Mills". Retrieved 3 April 2014.
- Criger, Erin. "Toronto bans the sale of cats and dogs in pet stores". Retrieved 3 April 2014.
- Duncan, Ashley. "Brief Overview of Retail Pet Stores". Retrieved 3 April 2014.
- "Ontario's Animal Protection Law Strongest In Canada". Retrieved 3 April 2014.
- Pet Industry Joint Advisory Council - Pet Industry Joint Advisory Council (PIJAC) is the world’s largest pet trade association, representing all segments of the pet industry.
- American Pet Products Association - The leading not-for-profit trade association serving the interests of the pet products industry.
- Dog Training and Grooming advice
- Dog Training and Feeding advice
- Small Dog Breeds and Supplies
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