Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23, 2025
Pet's info: Dog | Jack Russell Terrier | Male | neutered | 18 lbs
Hello! My senior Jack Russell has developed black crusts around his mouth, particularly on one side where he sustained a cut from another dog earlier in life. He has dealt with food allergies in the past, but recently seemed to have found a good combination that quelled other symptoms. The crust doesn't seem to hamper him much, but he does scratch them and that can cause them to break and bleed. What could be the cause? Are the options aside from steroids for treatment?
1 Answer

Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS
Veterinarian
Published on March 8, 2019