Question: are grapes toxic to foxes?
Answer: DEAR TERRY: Grapes and raisins can be toxic to foxes and dogs, so it's best to keep the grapes away from them. ... And that's not sour grapes. If you're composting grapes — or avocado, onions, garlic, chives, tomatoes (fruit and leaves), potatoes and mushrooms — take care that the foxes and dogs can't get to them.