Food safety
Can dogs eat plain pumpkin?
Yes — fine in small amounts
Plain cooked or tinned pumpkin (not pie filling) is gentle on the stomach and often suggested for firming up loose stools.
How much
A spoonful or two
Being honest about this
Dogs differ, and amount matters — a crumb of something rich is not the same as half a packet. Treats of any kind should stay under a tenth of what your dog eats in a day. If you're unsure, your vet would far rather take the call.