MY SHIH TZU, DIXIE, HAS BEEN SCRATCHING AND BITING HER HIND QUARTER BY HER TAIL THE LAST FEW DAYS. I CHECKED HER FOR FLEAS (NO VISIBLE INFESTATION) AND PUT FLEA MEDICINE DOWN HER BACK TO WARD THEM OFF, BUT SHE IS STILL CONSTANTLY SCRATCHING AND BITING. MY HUSBAND DID FERTALIZE THE GRASS AND I WAS WONDERING IF THIS COULD BE THE PROBLEM? THANK YOU.
Sometimes this is a sign that the anal glands need expression. I would have the vet check her out. vetcare