Why is my dog licking hair, has red crusty skin patches on his back?

Question

I have a Great Pyrenees that is licking his hair out around the back and side. Has white crusty patches that are red underneath them. I use hydroconstine spray. He is 3 yrs old. Pet's info: Dog | Great Pyrenees | Male | neutered | 5 years and 4 months old | 100 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Poor Maxwell! There are quite a few different things that can cause hair loss with redness and crusting in dogs, so it's hard to say what might be wrong without being able to examine him and do some testing. Some common possibilities would include allergies (food allergies, or an allergy to something in the environment), a bacterial or fungal skin infection, or skin mites (mange). Treatment will depend on what the underlying problem is, so it's important to get a diagnosis first. Because of this, I would recommend taking him to the vet for an exam when you are able to. He/she can do some simple skin tests to help diagnose the problem and get him started on appropriate medication to treat it.

Why is my dog licking hair, has red crusty skin patches on his back?

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