*For the moment, this is all the info I'm posting. It's going to be a while before I get the time to post all the info on breeding.

The story of Lil'Bit: Megacolon - Keep in mind that this story specifically discusses the importance of not breeding pet store rats. The reason this is is because you can never be certain of the genetics, and thus end up with a tragedy like that of Lil'Bit. It is also possible for megacolon to appear even with rats obtained from a reputable breeder and this is why it is so important to have a good knowledge of genetics before breeding anything. A resonsible, reputable, ethical breeder will generally ask adopters to sign a contract stating specifically that you are not allowed to breed their rats, so that stories like that of Lil'Bit are less likely to happen.
More information on megacolon