Does you dog have any hair loss any place on its body? It could be a fungal growth on its skin. My dog, just an good old mutt like me, developed a horrible smell and I would wash her and it would be back within hours. She was scratching herself to death! I finally took her to the vet and it all started out as an allergy to fleas! the fungal infection was secondary. he gave her a shot, and she went on benedryl(no kidding) and I just used the topical generic yeast infection medicine you can buy from wal-mart. My vet and I went to school and college together! ... View related article.