Can dogs eat broccoli? Yes, with caveats. Broccoli is safe for dogs to eat in small quantities, especially in the beginning, because they can cause some stomach issues. Different dogs may react differently to isothiocyanates, which can cause mild or, potentially, severe gastric irritation. More than 25% of the daily diet of broccoli could be toxic to your dog according to the AKC.
One other hazard you want to avoid with broccoli is choking. Make sure to cut broccoli up into small bite-sized chunks.
Dogs can eat broccoli that is either cooked or raw. Do not use any seasoning or oils when feeding your dog broccoli. It is high in fiber and vitamin C and low in fat.
If you have further questions or concerns to any of the above talk to your vet for the final advice on whether your dog can eat broccoli.