The quick answer: Yes, plain asparagus is safe to feed in moderation.
Benefits of asparagus
Asparagus is low in fat and sugar and high in dietary fiber, making it a healthy vegetable. Other nutrients include vitamins C, E, and K as well as copper, folate, and antioxidants. It is not toxic to pets and is safe for them to gobble up a bite, however, it isn’t the ideal vegetable to share with pets. Raw asparagus is very tough, making it difficult to chew and digest. For pets, the best way to serve asparagus is boiled or steamed since it’s easier for a pet to eat. Pets should only eat plain asparagus—that means no seasonings, butter or oil.
Some pets are picky eaters and asparagus may not be your pet’s first choice in veggies. We recommend opting for more pet-friendly vegetables that can are easier to eat, such as carrots, cucumber, or celery.
Asparagus is often cooked with butter, oil, salt, and other seasonings. It’s important to never feed your dog asparagus that has been seasoned with garlic or onion powder (or any seasonings that contain them) because these are toxic to dogs. Avoid feeding buttered asparagus to pets as well. Though a tiny nibble may be fine, eating vegetables that have been cooked in fats can cause pancreatitis or upset stomach.
In addition to being difficult to digest, raw asparagus stalks can also present a choking hazard if they are not cut into bite-sized pieces. It’s best to limit your pet’s intake of asparagus, regardless of how it was cooked, because too much can cause vomiting, gas, or diarrhea.
Asparagus fern, the inedible part of the plant, is toxic to pets. This is important to note if your dog has access to a garden where asparagus is growing.