Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
Pet's info: Small Animal | Mouse | Female | unspayed | 0.02 lbs
My mouse has been suffering from self mutilation, she has lost one ear and her fur is very thin and she seems a lot skinnier than her sister. Her sister is doing fine. I try and apply ointment to her ears when they start to look bad. She is around a year old and I just want her to be comfortable. She is also constantly making loud sneezing like noises but not quite a sneeze. I’m thinking that putting her to sleep may be an option. Please give advice. :)
2 Answers

Answered By Todd Cecil
Veterinarian
Published on January 12th, 2020
Answered By Todd Cecil
Veterinarian
Published on January 10th, 2020
Thanks for reaching out about Cheddar. This is a common occurrence in mice but unfortunately a cause has not been established. Autoimmune disease, inflammatory processes and deep bacterial dermatitis are all possible. Have had limited success with systemic antibiotics, anti-inflammatories, topical cream (silver sulfasilvadene [SSD]) combination might help. Prognosis is poor but can give it a try.
Good luck.
1Pet Parents found this answer helpful