I am shopping around a few pet shops for some breeders, and I am trying to make a decision on size.

I think a medium sized male should work for breeder, but what size should I get for the females? Small? Medium?

I asked 2 people at the pet shop and they said the mediums are 5 months old (err, what!?) I figured the medium was more likely 2-3 months old, and a good age to get for a breeder....

Any advice on this? i know it varies by pet store, and I dont want to generalize, but what size rats do you get for breeders?


Thanks!
Bryan