Foot licking/chewing is the way that dogs indicate that their feet are itchy or painful. The most common reason for chronic foot licking in dogs is allergic dermatitis (food allergy or pollen/dust allergies) with secondary yeast or bacterial infections between the toes. If only one foot is affected, is is possible that an abrasion or trauma initiated an infection. In older dogs, hormonal diseases such as hypothyroidism can predispose to infections and foot licking as well. The brownish discoloration can be due to salivary staining or a yeast infection. I recommend that you take him to your veterinarian for diagnosis and treatment. If all symptoms go away with treatment of infection but then recur later, then an underlying cause must be pursued.
Kimberly Coyner, DVM DACVD
Dermatology Clinic for Animals of Las Vegas
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.