oh god i wouldnt suggest breeding them and selling them to a petstore. you dont know whats going to happen to them there. its one thing if you breed a litter and keep them and love them to yourself but please dont breed for a pet store. in the case of my rats, i got a pregnant one and she had seven babies and i was going to give them back to the pet store till i found out they sell them for feeder rats now i'm going to keep them all to myself and give them lots of love. keep all this in mind.