A few questions about rat breeding

I move babies all the time. they usually don't mind. I also foster out pinks all the way up to almost weaned.

Even easier than looking for distance between openings is looking for the two rows of nipples that appear only on females. :gj:

We handle pinks all the time. We change bedding twice a week and we don't pick and choose which tubs we change so if they have pinkies they get moved. We've never had a problem with it but the female will bite ya sometimes. Lol