this will sound crazy but I am an old man who has cured dogs the vet could not cure with " very used motor oil " new oil will not help or work at all.
very old burnt oil from a terrible running car has stuff in that old oil that will kill anything on a dog. I know it sounds crazy but it has always worked for me. good luck
That's a new one! I don't have really old motor oil. I don't change it myself... I take it to the dealership. I'll have to remember that one! Maybe Coca-Cola... hey, it cleans batteries. Okay, perhaps a bad joke.