My dog has fur loss in strips, black skin. What could be causing it?

Question

My bull mastiff is losing her fur. Almost seems in strips. Down to the blacl skin. Started about 2 months ago. She is about 18 months old and has regular vet checkups. They cant seem to find out what is wrong with her. Pet's info: Dog | Bullmastiff | Female | unspayed | 1 year and 7 months old | 90 lbs

Shaneez Wallani, DVM · Accepted Answer

Hair loss can be caused by bacterial infection, parasitic infection (like mites or fleas) or fungal infection (like ringworm), dietary or environmental allergies or sensitivities, immune system disorders, or a combination of the above. I recommend making an appointment to have Sandy seen by your veterinarian again to help determine the cause of the hair loss as soon as you can. The vet may want to look at a sample from the area (taken by a procedure known as a skin scraping) and examined under the microscope to determine what kind(s) of infection may be present and to figure out what medication is appropriate for treatment. If these tests have been done and the results did not help provide a diagnosis, I recommend asking your vet for a referral to a dermatologist for further workup. Having Sandy spayed may also help her skin, as some skin conditions can be worsened by hormone fluctuations that occur in unspayed female dogs.

My dog has fur loss in strips, black skin. What could be causing it?

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