I buy my live at petco never petsmart. Petsmart is well known to be anti-live feeding and most of their stores dont even sell pet mice. Maybe have 1 or 2 but they have a like fury friends sign hanging over it with pics of children playing with them. Petco on the other hand at least where Im at have a male and female tanks with like 50 mice in there. Obviously you dont hold a stock like that to be sold as pets and one of my "snake guys" that is very smart when it comes to snakes works there and he would have pulled me aside outside his work like he does all the time to tell me things that he couldnt just tell the average customer. So Im pretty sure you good to go with petco just not petsmart.