My first 2 litters are one month old today. How do I hold them to see the bottom, they squirm and jump (and nip a bit). The 2 females look pregnant again, so should I seperate the 1 month old pups now, or just wait? I want to make 1 more colony. Also I guess I'll have to make 2 grow out tubs, one for males and one for females too.