Reptile & Amphibian Forums

Since late last summer I have had a colony of feeder mice in my garage, last count 17 (14 females and 3 males).
They are all kept together in 2 large connected cages and last time I introduced a new male he was bloodily and brutily attacked and ended up getting stunned and fed to my Brazilian Rainbow Boa.
If this inbreeding if offspring keeps up will I end up have Elephant Man looking mice?
I guess my question is; How long can I keep inbreeding these mice before I have to take 4-8 females out, freeze the rest of mice, and get a new male?
Thank You
Uncloudy
Pic of Cali King lounging in a skull (bummer not my snake hating ex-girlfriends skull...lol)

most of us have inbred mice through many, many generations without problems. At some point though, it will become a problem. It is generally accepted that introducing some fresh blood is a good idea. In your situation, I would take a female that is obviously ready to give birth, seperate her, kill off the male babies, let her raise the females, buy a new male and put him in when the girls are old enough to breed. You now have a new colony going. Another thing you can do is just kill off the existing males and introduce 1 new male. Let a female raise up 1 of his sons.
good luck

Not really, if you are worried pick up an unrelated mouse and start outbreeding to introduce new genes in the colony.
Justin