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Ask Dr. Michael Salkin Your Own Question
Dr. Michael Salkin
Dr. Michael Salkin, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 28564
Experience:  University of California at Davis graduate veterinarian with 45 years of experience
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I have a female mastiff that is approximately 9 yrs old. Her

Customer Question

I have a female bull mastiff that is approximately 9 yrs old. Her skin pigment is getting a lot of dark patches. Along with this she is getting more and more bumbs sticking out past her body. Some have broken open and had a pussy discharge. What is this?
Submitted: 1 year ago.
Category: Dog Veterinary
Expert:  Dr. Michael Salkin replied 1 year ago.

Damian, I would suspect a superficial spreading pyoderma (a Staphylococcal infection, usually). The initial skin lesion is a pustule ("bump sticking out past her body") which when broken open releases pus; the infection can spread outward in a roughly circular fashion forming an epidermal collarette which then heals from the inside out. The center often hyperpigments (the "dark patches") but the rim of the collarette can stay actively inflamed and infected. A superficial spreading pyoderma is best addressed with a systemic antibiotic in the cephalosporin class such as cephalexin administered for 3-4 weeks and 1 week past clinical signs. Bathing twice weekly in a chlorhexidine- or benzoyl peroxide-containing shampoo should hasten resolution. The antibiotic will need to be prescribed by Jada's vet. The shampoos can be found over the counter in pet/feed stores, at jadaq's vet hospital, or online.

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