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Sally G.
Sally G., Dog Training Consultant
Category: Dog
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Experience:  Service/assistance dog training/ behavior /obedience/Therapy dog Evaluator/AKC Evaluator
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Why does my dog bite himself constantly until he bleeds

Customer Question

He bites his paws, legs and tail constantly. I have sprayed hotspot, flea and tick drops, aloe and hotspot shampoos. But he still bites himself until he bleeds.
Submitted: 10 years ago.
Category: Dog
Expert:  Sally G. replied 10 years ago.

Hi Aretha Stephenson,

Dogs that continuously chew may have a flea allergy or a seasonal allergy. For a flea allergy, the dog does not have to have many fleas, on bite is all it takes for an allergic reaction.

A seasonal allergy often shows up in the licking of the feet and chewing until raw.

Fungal infections and bacterial infections would also cause this , but the vet would need to take a skin scraping to determine this.

Hot spots (moist dermatitis ) is another reason for chewing.

You can give the dog benadryl to help with the itch. Make sure it is benadryl allergy and not the allergy/sinus. I would suggest since you are using flea control that the dog go in for a skin scraping to determine the cause.