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My new Petco mice keep dying within a week. What's the problem?

Updated on September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Female

Hi, I just have a question regarding the fancy mice in my Petco. I originally already had a female mouse, but I read that it would be better to get more as company, so I went to Petco (original mouse was from a different store). Unfortunately, the new mouse died within a week. I repeated this process twice, and ended up with two more mice who both died within a week. I've done a lot of research, and I know I'm taking care of mice correctly. What could be the problem?

1 Answer

Most Helpful Answer

Mariya Gugel, DVM

Answered By Mariya Gugel, DVM

Veterinarian

Published on January 30th, 2018

Thank you for using Petco Pet Education Center, formerly Petcoach! I’m sorry for your losses. I do need a little more information to give you a better idea about what is going on - were there any signs prior to death? Some mice carry bacteria and viruses that do not necessarily make them sick, but can be transmitted to other mice and be harmful. I hope this helps and am happy to answer any other questions you have!
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