SlickDirtyDancing, you are wrong. Sorry, but it's true. I'm not dissing pet store rats, most of mine have been. And yes, lots of PS (pet shops) get their rats from "breeders". But I say breeders in the loosest possible way. They might throw a male and female together, but they don't know the genetics, lineage, ect. of their rats. They don't breed show quality rats eiher. And PS rats are not bred to have long healthy lives like a well bred rat. Many good breeders will stop and entire line of rats if tumors appear in one or two animals and contact the homes any relatives have gone too. This is a subject I feel very strongly on, I hate the ignorance that makes people think it's fine to breed low quality rats. Their are plenty of sweet cute rats, that doesn't mean they should be bred. If you want to breed, go to a rat show and see hoe your rats hold up. If they don't do well, don't breed. At the very least, be sure your rats have no history of genetic illnesses, or a high prevalence of tumors.