Why is my dog rubbing her face on the carpet?

Question: 

My 4 year old Chihuahua mix is rubbing her face on the carpet, licking her feet some and seems to have thinning hair on her back legs. She eats a high quality diet, gets lots of exercise and does not seem sick. What could this be?

 

Answer: 

A number of problems might be causing these signs. Atopy (inhalant allergy), food allergy, skin infections, or various endocrine problems are a few of the underlying causes that may be present. Your veterinarian should be consulted on the next best steps to take. If the underlying cause cannot be determined, referral consultation with a board certified dermatologist should be discussed with your veterinarian.