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Question on rotating out old mice??

Buzzard

Buzzard

two corny
Being a only a month into breeding my own mice,

I hear that you should rotate breeder mice out (or cull them out) about every 6-8 months, when there productivity starts decreasing. So how??? Should I let one of the offspring of the colony just stay in there. Introducing a new female is wrong they all would attack her. Or is there some magical :crazy01: way to intro them????
 
I'm kinda new to breeding mice as well, might want to try PMing wade, he's the resident expert here. Anyway I introduce new mice when I clean and change substrate, they seem to think everything is new so they haven't attacked each other yet.
 
I don't introduce new mice to an established colony. When they don't produce I cull them and feed them to my big boy. I start a couple of new colony with a new male and 3 to 4 females about every 5 or 6 months. Good luck with your mice.
 
Yes me too I dont tend to introduce new females, I keep the same colony until the litters start to get smaller then just start over again. If you do want to introduce new ones you are best to completely clean out the cage first and disinfect everything then add all the mice back in with the new one.
 
I think it depends largely on your mice. I have introduced females to an established colony without any trouble other than a tiny bit of scrapping...

I have found that taking ALL the mice out of the container, cleaning it, new food, water, bedding etc, putting the new female in first and then the rest usually works...

But keeping back females from a litter is the ideal thing to do.
 
I have started another colony, but When I got started the person who helped me gave me a mixed bag of females. Some are older than others. None of which are more than 4 months old. So I can introduce some new females as long as it is neutral ground. That is way cool.
 
Velvet said:
I have found that taking ALL the mice out of the container, cleaning it, new food, water, bedding etc, putting the new female in first and then the rest usually works...

But keeping back females from a litter is the ideal thing to do.
Click to expand...
I have done this also with some success in the early going while setting up my colonies. But now I just keep back several female juveniles and a male from a different colony to create new colonies. My plan is to cull after every six litters, and the entire breeding colony will be culled.
 
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