You are here:

Ask the Veterinarian/Baby mouse sick ?


Hello !
Four days ago, I got two mice. One is a white mouse, and one is a black one.
I have a concern for the black one. He is just a baby, baby. I am not sure what his exact age is. He is also the runt. The white mouse, Cream, is a bit bigger than him.
My concern is, Cookies(the black mouse) breaths differently than Cream(The white one). He kind of huntches when he walks, he breaths fast and deeply. He looks different than Cream.
They are in a cage together, and at night before, I go to bed, I check on them and Cream is usually laying on Cookies. I am worried by this because if he has troubles with his breathing already, do you think her laying on him makes it worse ?
Another concern is he doesn't really do anything. The white mouse is very active, and when I hold her she is all over the place, but when I hold the black one, he just sits in my palm. When I am holding him, and he's just laying on my palm, he makes this weird clicking noise.
I'm not sure if this is a big concern, but if it is, what should I do ?

Hi Taylor,
I don't do mouse medicine but I can tell you from what you said that your black mouse isn't right and could have pneumonia or some other breathing difficulty.

I would take Cookies back to where you got him and get a different mouse that is healthy. I know you are probably attached to him/her already, but it sounds as if this mouse is sick.

To prevent cream from getting sick as well, I would separate them as well.

I hope you can find what's wrong with him/her but if not, get a new mouse. I don't know many vets that will look at a mouse but I suggest you call around if you think you want a vet to look it over.

I doubt if Cream lying on Cookies is the problem. Most likely Cream senses that Cookies is ill and is trying to protect and warm him up.

Sorry you are having these difficulties with them.
There are some mice experts in here so you can post this to them as well.  

Ask the Veterinarian

All Answers

Answers by Expert:

Ask Experts


Jana Connell RVT, CVT


PLEASE READ BEFORE SUBMITTING TO ME: I am NOT a vet and do NOT diagnose diseases. That is only for a licensed Veterinarian to do. I will give you suggestions and steer you toward calling your vet for help. You can call the vet's office and talk to the technician there or the vet at times. Don't be afraid to call them! If you have a serious issue with your pet please post it to one of the veterinarians in here- I will tell you the same thing in my answer. IF your pet is injured or in an emergency situation, CALL YOUR VET- Do not wait and post in here. Just call the vet's office and get them in to see the vet right away. Critical treatment time is lost if you seek answers here when you should have your precious pet at the vets!! Don't sit at home waiting for an answer when your pet is critically ill or injured!! I can answer most questions about small animal and wildlife care as well as small animal nutrition. I can also answer questions about all phases of dental care for small animals. I DO NOT answer questions about birds (unless it is wildlife or songbirds) or HAMSTERS/GERBILS/CHINS/GUINEA PIGS/REPTILES/FROGS/RABBITS/PET BIRDS OF ANY KIND so please submit these questions to the appropriate sections. I, as well as other experts in here, do NOT do homework questions- that is for YOU to do! Please respect these rules for all of us. Thanks!


I have over 42 years experience in the field of veterinary medicine. I specialized in small animals and did wildlife rehab for over 25 years, mostly raptors, squirrels and opossums. I am a Small Animal Nutritional Consultant with 6 certificates from Hills Pet Foods, CNM and Purina. I also specialized in Small Animal Dentistry which is a field I truly love. I also Teach Veterinary Technology to working technicians who are studying to take their California Tests to become Licensed Technicians. They have to take both the VTNE (Veterinary Technician National Exam) and the California boards.

Audubon,World Wildlife Federation, American Society of Veterinary Dental Technicians.


Licensed with California and Oregon, RVT and CVT. Certified Veterinary Dental Technician Have over 1500 logged hours of Continuing Education Credits(that means I keep up to date!).

Awards and Honors
Nominated for Expert of the Month for the last 5 years.

©2017 All rights reserved.