I have a pit mix with food allergies. She loses the hair on her chest and the top of her head unless we feed her prescription dog food. We tried a number of limited ingredient foods to no avail. This stuff seems to do the trick, her hair grew back and her energy is back, but her poop smells nasty on it and it’s expensive as hell.
On the other end of the spectrum, my greyhound eats anything. He’s a tall boy, and can get to anything on my counter, and when we first rescued him he had absolutely no indoor manners. He has stolen and eaten numerous sandwiches, loaves of bread, a whole bag of tomatoes, and even stuck his head into a pot of gumbo while it was still on the stove. He ate part of a roll of paper towels once, right off the dispenser. Stupid bastard freaked out the next day when he, himself, turned into a towel dispenser. I ended up pulling three or four intact sheets out of his ass because he was jumping around going crazy with the “lead sheet” sticking half way out.
Needless to say, I don’t encourage either one to eat anything that doesn’t come directly from a hand or a food bowl.