what causes hair loss and redness under dogs chin- I changed his dishes to glass-I've used anti-biotic ointment, hydrocortisone cream- anti-fungal cream and even antibiotics (keflex)- nothing is clearing this up??
It could be an allergy or a skin infection to some change in his diet (maybe even the dish). If he appears to be uncomfortable, I would take him to the vet. However, if he doesn't seem to be in any discomfort, it could just be old age (how old did you say your dog was?).
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