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Dr. Joey
Dr. Joey, Board Certified
Category: Cat
Satisfied Customers: 579
Experience:  15 yrs in practice, specialist canine/feline medicine
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Again. The patch seems to have darkened since I noticed it

Customer Question

Hi,again. The gray patch seems to have darkened since I noticed it on Monday and the darker area taken on an S shape. Today it seems to have changed again, and is a little more diffuse. Anything going on here? Thanks.
Submitted: 1 year ago.
Category: Cat
Expert:  Dr. Michael Salkin replied 1 year ago.

You're speaking with Dr. Michael Salkin. Welcome to JustAnswer. I'm currently typing up my reply.

Expert:  Dr. Michael Salkin replied 1 year ago.

Sorry for the delay. I'm visiting relatives in North Carolina. To determine if the pigmentary change is significant I would have to skin scrape looking for the rare Demodex mange mite, and culture looking for bacterial (Staph, mainly) or fungal infection (unlikely in a purely indoor cat). More likely, the pigment represents a benign idiopathic (unknown cause) change at Chumley's age.

Customer: replied 1 year ago.
More pictures for comparison. I had him to the vet about 10 days ago,where he got a shot of Convenia for a possible mild bronchitis. One of the vet techs combed him a bit in that area,and I wonder if he picked up something then?
Will the Convenia take care of it? Is it self- limiting? Thanks.
Expert:  Dr. Michael Salkin replied 1 year ago.

The Convenia is ideal for a Staph infection and one injection might suffice. What I can't know, however, is if the hyperpigmentation represents a Staph infection. If he were shaved and you saw roughly circular lesions (epidermal collarettes), a Staph infection would be most likely.

Customer: replied 1 year ago.
You'd wonder how it would get started with Convenia in his system.No other spots right now without trimming him. (Don't know if I want to play "shave the cat".)
Expert:  Dr. Michael Salkin replied 1 year ago.

I agree. A Staph infection is likely with that type of antibiotic inside him.