Cats can eat plain tuna, but it’s best to avoid feeding them lemon pepper tuna. While tuna itself can be a healthy occasional treat for cats due to its high protein content, lemon pepper seasoning may contain ingredients that could be harmful to them. The added lemon and spices might upset their stomach or cause digestive issues. It’s always safest option to stick to plain, unseasoned tuna when offering it to your feline friend. Remember to remove any bones and ensure the tuna is fully cooked before sharing it with your cat. Consulting with your veterinarian if you have any questions concerning your cat’s food choices.