There are a bunch of food that dogs should not eat.
Chocolate
Raisins or grapes
Apple seeds
Xylitol (artificial sugar)
Green tomatoes
Garlics, leeks, onions, chives, and everything else in the onion family.
Pit from fruits like cherries, peach, avocados
Macadamia nuts
Alcohol
It’s usually not a good idea to feed your dog just 1 food because your dog won’t get the variety if nutrients that it needs.