There are a bunch of food that dogs should not eat.
Raisins or grapes
Xylitol (artificial sugar)
Garlics, leeks, onions, chives, and everything else in the onion family.
Pit from fruits like cherries, peach, avocados
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.