Are Pecans Safe For Dogs. Black walnuts, english walnuts, and japanese walnuts can contain fungi called tremorgenic mycotoxins which cause vomiting, tremors, and seizures. When it comes to pecans, it’s best not to share them with your pooch—pecans are considered to be toxic to dogs, due to their ability to grow mold and potentially lead to gi distress, intestinal blockages, or other serious symptoms like seizures.
Much like walnuts, pecans can be prone to molding, which can create both juglone and aflatoxin. Moreover, juglone in pecan can be very toxic to dogs and lead to great health risks. Call your vet straight away if your dog eats pecans, pecan shells, or any recipes that contain this ingredient.