Pies, especially those with fillings like pumpkin pie, often contain spices such as cinnamon, nutmeg, ginger, and allspice, which can be mildly toxic to cats and cause gastrointestinal upset.
High sugar content and certain ingredients in pies can also be harmful to cats.
Suggestions
If your cat consumes a small amount of pie, it may not cause harm, but it is best to avoid giving them any pie.
If your cat eats more than a small lick, consult your veterinarian for advice.
Instead, offer plain, cooked pumpkin with no added spices or ingredients.
Note: even if labeled as safe, any food can potentially cause allergies. When introducing a new food, please feed a small amount and observe your cat for any allergic reactions.