Cheese — Food safety facts
Feed with care · Dogs · full breakdown on the linked food page
Most pets are lactose-intolerant to some degree. Tiny pieces are fine as treats; avoid if your pet gets diarrhoea.
Short answer
Yes, a tiny piece of cheese is generally safe for most dogs when given sparingly. Many dogs are partially lactose‑intolerant, so keep the portion very small. If you notice loose stools, gas or vomiting, stop feeding cheese immediately. Otherwise you can offer a small bite as an occasional treat. Keep an eye on your dog and call your vet if any digestive upset occurs.