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My cat has a recurring rodent ulcer. Should I try lysine or omega?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Female | spayed | 10 years and 11 months old

My cat has a small rodent ulcer on the corner of his mouth. At the end of October, our vet gave him a steroid injection and Clavamox. Eventually the inflammation cleared up. Unfortunately, the ulcer has returned. His appetite is fine (Blue Buffalo indoor dry kibble since he was a kitten), we use ceramic bowls. He's not scratching and I really don't think he has fleas. I'm wondering if lysine would be helpful or if an omega supplement would be better? Maybe colloidal silver?

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on December 17th, 2017

Poor Vivian! Unfortunately rodent ulcers are usually an auto-immune issue. I certainly think lysine and omega 3 fatty acids are beneficial long term. Vetriscience has some good products for both of those. I would also consider a veterinarian prescribed hypoallergenic diet. I am not sure colloidal silver will help. Some of these guys end up needing multiple steroid (+/- antibiotics) injections throughout the year to keep it under control. If it doesn’t start to clear up I would consider another steroid shot. Cats usually tolerate them well every 6-8 weeks. I hope this helps.

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