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Mice/Housing Field Mouse and Feeder Mouse Together


Hi there - I rescued an orphan baby field mouse and fed her around the clock for three weeks until she was more self sufficient. I have her in an 18 inch fish tank but now that she is older (maybe 5 weeks) she is going nuts in captivity.

Question: If I get a larger habitat, could I get a female feeder mouse to be her companion? Or must I turn her loose, choosing between her being unhappy in a cage or dying quickly in the wild? I am fond of her and want the best for her. She is losing hair and I have taken her to a vet twice to treat for mites but really I wonder if it is simply stress. Please advise!!

Dear Tracy,

First try getting her a much, much bigger cage. A 40+ gallon tank; a cage for a larger animal covered with hardware cloth; a converted multi-bird cage. And two wheels; and lots of toys and things to climb on and in and under and through. and to chew. This can have a huge effect.

You will want to get two or more new mice for a few reasons, one being that mice should be kept in threes or more because when there are only two, it is terrible for the one left when one dies; and the other being that if the orphan still isn't happy with a huge cage and two friends you will have two mice left after you set her free.

By the way if you have no cats and don't want to release her outdoors, you can set her up a cage she can go in and out of in the house. That is more dangerous than living in her cage but less so than moving out; and won't break her heart.

However, get mice either her size or wait and get some smaller than her.

Be aware that pet stores may have viruses which could kill her or any mouse. Look carefully to make sure there are no dead or sick rodents of any kind in their cages. Healthy animals have bright eyes, smooth fur, no scabs or wounds; mice should be sleek and lithe, never hunched over or with messy fur.  There are no guarantees at all and if you want to be safest then have the two new mice live with someone else for two weeks or more before they come into your house.

Field mice can be awesome and loyal pets and they live much longer than house/fancy mice; regular handling can be crucial.

Let me know how she does :)

Squeaks and giggles,



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I can answer questions about raising mice and caring for them as pets, with knowledge from my 38 years of having fancy mice as pets. I have NO MEDICAL TRAINING and you should take a sick mouse to the vet; but if you simply can't, I will try to help you. I LOVE PHOTOS!!! I ALSO LOVE UPDATES! Let me know how the little tyke is doing later on, for better or worse, especially orphans. It also helps me to help the next person. Please first search first: use 'Natasha Mice Mouse' with whatever else your question includes. Or check out these links: **** YOUR FIRST MOUSE (my video; rough draft): **** TEN VIDEOS ON RAISING ORPHANS: **** SEXING MICE: **** And some GREAT MOUSE INFO SITES:


I have had mice for 40 years (since I was 5!). I raised them when I was a child but now I keep all females, and never fewer than three so that if one dies the others are not devastated, because they have each other.

I run Rats and Mice are Awesome on Facebook. The official name is Rats are Awesome.

B.A., M.A., M.A. in Linguistics: Yale University and University of Connecticut

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