DO NOT DO IT! mice and rats are a huge pain in the a** to try and breed and grow, you would need literally hundreds of snakes or monitors for them to consume enough mice to make it worth your time and money. try looking up some rodent farms that might be near you or will ship free to you. I think that rodent pro ships free to some states. I live in FL and get off easy because I am less than 10 miles away from gourmet rodent and do not have to pay shipping. just try looking around online for deals because you WILL regret it is you try raising your own mice or rats. they stink, they fight, they eat too much, they make a mess, it is expensive to start, they take a long time to grow from pinky to adult, and i could go on all day....