Quote Originally Posted by SlitherinSisters View Post
Rats are rarely aggressive with each other. Right now I have two males in the same tub as a bunch of females, but one is a retired breeder that I've been waiting to die for over six months now-his manhood shriveled up long ago. I don't normally keep my breeder males together, just so I know who carries what genes.

I breed by cycling the females. They go into the breeder tub, into nursing tubs when they get big, their babies go to grow out tubs while mom gets a break, then mom goes back into the breeding tub. I've never had a problem with introductions, they just sniff each other like crazy.
Is your nursing tubs with a single female or do you put multiple moms in a tub? My wife has a thing with pack animals having to have friends.....one of the many reasons our house is a zoo. Also what tub size would be best for a 1.3 group? I have a 55gallon glass tank that I could use but ventilation wise not sure if that would be a wise choice especially if all 4 were in there at once.