Why Is My Dog Chewing on Skin & Pulling Out Hair?

Allergies to fleas or insects, especially in the summertime Atopic dermatitis: a skin condition resulting from hypersensitivity to allergens Anxiety, boredom, frustration: chewing helps reduce tension Teething pain (puppies): puppies will often try and relieve the soreness in their gums from their newly growing teeth through chewing to soothe these pains Pain and itching: dogs in pain will often engage in chewing around the painful area