Not recommended. Most types of pizza are high in fat, calories, and sodium, which can lead to obesity and other health problems if consumed regularly or in large amounts.
Pizza toppings such as onions, garlic, tomatoes and mushrooms can be toxic to dogs, and cheese can be difficult for some dogs to digest.
If you want to give your dog a treat, there are many other options that are safer and healthier, such as small pieces of cooked lean meat, vegetables like carrots or green beans, or commercially-made dog treats. If you do decide to give your dog pizza as an occasional treat, you can bake a special pizza with dog-safe ingredients.