The RSPCA recommends that you do not purchase a dog from markets or places where large numbers of dogs are kept for sale. Dogs sold from these establishments are very rarely examined by a veterinarian, and therefore may not be entirely healthy. Never purchase a puppy that looks unwell and if you are concerned about the welfare of the animal, contact the RSPCA Inspectorate.
Pedigree or purebred dogs are more expensive to buy if purchased from a breeder and their nature and appearance is generally predictable (as they should conform to a breed standard). Crossbreeds (or 'designer dogs') are dogs of mixed ancestry. They are robust and often make great pets. Keep in mind though, that when you purchase a crossbred puppy it might be difficult to accurately predict how these puppies will develop. Both purebred and crossbred puppies and adult dogs are available at RSPCA Adoption Centres.
To be a successful pet shop owner, manager or employee, you need to be able to sell merchandise, from pet food and toys to cages, fish tanks, leashes and the pets themselves. Obviously you need to know about caring for different animals in order to keep the animals you are selling in good condition; and advise customers on the products they might buy. Some pet shops may be more caring for the animals than others.