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Why is my Jack Russell on Apoquel itching and losing fur on legs?

Updated on September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Female | spayed | 19 lbs

12 yr jack russell on apoquel 4 yrs no problem. Now continuous chewing, licking, scratching til hair gone on bk legs. Has chondrosarcoma in mouth since may 2016. Any advice?

1 Answer

Most Helpful Answer

Sara Farmer, DVM

Answered By Sara Farmer, DVM

Veterinarian

Published on July 24th, 2017

Apoquel does not work well when there is a bacterial or fungal skin infection, so it is possible she has developed an infection secondary to allergies. Fleas or an endocrine disease like Cushing's are two other possibilities. I would recommend seeing your veterinarian - they might recommend some testing or starting treatment for an infection after they are able to examine Jazz's skin.
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