In addition to chocolate, other common human foods that can harm cats include grapes, raisins, onions, garlic, coffee, tea, alcohol, and raw meat or eggs. Talk to your vet about your cat’s diet and what constituents are safe treats for your feline friend. Some cats can have additional dietary restrictions due to specific health conditions. In addition to chocolate, other common human foods that can harm cats include grapes, raisins, onions, garlic, coffee, tea, alcohol, and raw meat or eggs. Talk to your vet about your cat’s diet and what constituents are safe treats for your feline friend. Some cats can have additional dietary restrictions due to specific health conditions.