Updated On September 23rd, 2025
Pet's info: Small Animal | Unknown - Small Animal | Male | unneutered | 2 months and 25 days old | 0.05 lbs
I've had my Male fancy mouse for 3 months. He has a 2 tier metal cage with an added external space. He has accessible pellet food and clean water. He also is sometimes given apple, pear, & carrot pieces. He is the only mouse, his aggressive brother was sent back one week into purchace. He doesn't like to exercise and has begun staying in one spot in his cage refusing to play even at night. He likes being petted and walking into my palm. I feel he is lethargic. What does he need & can I do?
1 Answer
Published on July 26th, 2018
Thank you for your question, and I am sorry to hear about Gus Gus. I would ensure that the bedding is clean and dry, and that the temperatures in your house are not too cold. A general rule of thumb that I use is around 70-75F for mice. Please ensure there are no drafts as well. I would also recommend checking to make sure he is eating normally (this can be hard in mice as sometimes they will cache food in different areas) and producing urine and feces. If you have done all of these things and Gus Gus still isn't behaving normally, I would recommend that you have him evaluated by a veterinarian. There are a number of clinics in your area that have clinicians who are comfortable in seeing exotic companion animals, such as mice like Gus Gus. They will perform a thorough physical exam and will make recommendations based on their findings. I hope that gives you a place to start, and I hope Gus Gus feels better soon!
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