Poppy seeds themselves are not toxic to dogs, but it is generally recommended to avoid feeding them to dogs. While small amounts of poppy seeds are unlikely to cause harm, larger quantities can potentially cause digestive issues, such as stomach discomfort, constipation, or even intestinal blockage.
Additionally, some baked goods or dishes that contain poppy seeds may have other ingredients that can be harmful to dogs, such as sugar, chocolate, or certain spices. It is best to err on the side of caution and refrain from intentionally giving poppy seeds to your dog as a treat.