I go with 1.5 colonies, although I was once up to 1.7 in a colony. Your biggest problem will be growing the babies to adulthood to feed to your snakes. I have 10 snakes that eat various sized mice, but if the mice reach 4 weeks in age, I try to pick out all of the males and kill them off. I've found that after this age, the young males will start to kill off pinkies if they have a chance and the "older" male isn't looking. They can devastate your production as well as create a stink. I only allow females to grow to adulthood, unless I have a male that is getting old. If that happens, I try to set aside a male for future breeding. I always keep young females in line in case something happens to an older female (thats how I ended up with a 1.7). If I have a female that consistently has small litters, she becomes snake food. If I have a female that eats her young more than once, she becomes snake food. If I have a female that isn't producing (you guessed it) she becomes snake food. I have several females that all have 24 or more babies per litter. Their mother once had 32 in a litter. I try to cull the litters down to 6 or 8 pinkies within a day or two. This helps the pinkies that are left to grow large quickly and it also takes a strain off of the mother.
Hope that helps, sorry for the long post. If you have any other questions, just ask.
Mike
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