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Mice/housing for mice


I have had my 2 female mice since early October, 2014,which makes them 2 in a couple of months.January this year I introduced two baby mice I adopted from a breeder.They got on pretty well at first but then as the babies grew they became bigger and stronger than my old mice, they started chasing and squeaking, nothing serious (no cuts etc).They are also in a pretty large cage so that cant be the problem.I have now recently put the older mice in another cage with a simple, comfortable set up so they cant hurt them selves because they are so old and fragile.I plan to introduce them again when one of my older mice pas away.only the two dominant mice were bickering so I think having just three would be alot easier to house together.What are your thoughts? what do you suggest, what would you do?
thank you

Hi Charlotte,

I think you were on the right track by separating them.  While it might be possible to reintroduce them after one passes away, it's also entirely possible that would be too much stress for a grieving mouse who is also significantly older than the bigger two.  I would personally be worried about them ganging up on her.  Then again, the best way to know is to try and supervise closely.

There are two other options - one, you could try adopting an older mouse whose temperament is well established to quarantine for three weeks (so no one gets sick) and then introduce to the older two.  Of course, if it goes south, then you could end up with three cages!  The other option is you could simply move the cages near each other, so they can have the company without having to share personal spaces.  Just some ideas!

If it were me, I would move the cages near each other so they can become accustomed to each other's scent, and share a little dirty bedding at each cage change.  Then I'd see what happened in the future when one passes on.  Of course, they aren't even two yet, and mice can easily reach three, so you may be planning pretty far in advance!

Best of luck,


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I can answer questions regarding mice as pets, mouse behavior, color and coat genetics, breeding techniques, and general health questions. I can help with caging and setup, nutrition, social issues, and what to do in most mouse emergencies (such as unplanned litters, injuries, fighting, etc.). I can also assist with questions pertaining to orphaned mouse pups, weaning litters, and questions of mating and birthing. I cannot answer questions about exotic or wild varieties of mice such as spiny or pygmy mice. *****FOR EMERGENCIES, anything requiring immediate medical intervention, PLEASE take your mouse to a professional veterinarian or wildlife rehabilitator who works with mice as soon as possible! IMPORTANT RESOURCES: Raising Orphaned Mice: Orphaned Mice Videos: Natasha's Your First Mouse: General Mouse Help: Mouse Info and Exotic Breeds:


I have enjoyed the companionship of mice nonstop since 2004, and spent a year caring for them in a lab where I learned a great deal about their breeding, social needs, and health. I spent a few years breeding them, specifically working with albinos, marked mice, angora mice, and satins. My education never stopped - I am learning something new every day from current and well-established research thanks to the wonderful folks at the Jackson Laboratory, as well as from my wonderful mousey friends online. I also love learning from my terrific questioners here on AllExperts - you folks keep my passion for these amazing animals alive and well!

East Coast Mouse Association - expired, American Fancy Rat and Mouse Association - expired

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