<human>: My dog is a black and tan coonhound, and has for the last two years been having problems with his ears, they're always raw and smelly, and full of boogery goo and black crust on his ear-flaps and outer-ear. We've been through several different cleaning solutions and he's been diagnosed by I think 3-4 vets by now. The most recent told him it was a food allergy, and we should try feeding him stuff that you wouldn't find in his diet normally (Usually kibble with occasional table scraps, so namely corn, wheat, grain, etc.). The vet told him to feed him sweet potatoes and pinto beans, since they're not prevalent in his diet, and said something about venison, I could've swore he said 1 part venison, 1 part pinto beans and yams. But somehow my dad didn't hear the venison part, and he's been eating strictly pinto beans and yams for about 6 months now. 

I'm getting worried, his ears aren't really getting any better, and he stays up all night, he's an insomniac. I think his low-animal-protein and low-animal-fat diet is really starting to affect his mental health. My mom and I have consistently urged him to start putting some fats and oils into his food, and I've slipped him a bit of protein supplement a couple times, just pure unflavored whey protein. My dad is very bulligerent and refuses to listen to us.

Could you distill the essence of the text into 1-3 sentences?
<bot>: My dog is being fed nothing but pinto beans and yams, what is this doing to him mentally and physically, and what's the best course of action?