Pumpkins are rich in carotenoids, beta-carotene, alpha-carotene, fiber, zinc, iron, vitamin A and potassium. In fact, you can tell the pumpkin is rich in the antioxidant beta-carotene, just by looking at its bright orange color. Pumpkin is a treat anytime of the year! Canned pumpkin is easy to serve and is packed with nutrients. Pumpkin puree is easy to mix in your dog’s food, give it to your dog as a treat. Be sure you only serve your pup 100-percent pumpkin and not pumpkin pie mix.