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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

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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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