Why is my dog biting his back end, chasing tail, and has red skin?

Question

Acting strange chasing his tail biting his back end red marks on skin. Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 5 years and 6 months old | 20 lbs

Jessica Keay, DVM · Accepted Answer

I am sorry to hear about Jake. I would be concerned he could have either intense itching or pain near his hind end that is causing this behavior. The base of the tail/hind end is a common site for flea bites. I would recommend a visit to the vet for an examination. They can check for fleas and skin infection (some dogs will get a skin infection secondary to flea allergy). They can also check for pain and neurological abnormalities that may cause these signs.

Why is my dog biting his back end, chasing tail, and has red skin?

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