I CO2ed my entire rat colony except for one rat that will be kept as a pet and never bred. (she is a beige hood dumbo from a blue hood dumbo)
Now I just need to clear the room of mites and get brand new breeders. I'm in the process of making tubs so I can stop using the glass tanks.
In a 71qt tub, how many female rats can live in it and raise their litters?