Dogs should not be fed avocado, as all parts of the avocado fruit—flesh, skin, and pit—contain a compound called persin that is toxic to dogs. While small amounts of avocado flesh may not always cause harm, larger amounts and other parts of the fruit can lead to health problems like vomiting, diarrhea, pancreatitis, gut obstruction, or even heart issues. The avocado pit is particularly dangerous as it can cause choking or gut blockage. Overall, it is safest to avoid feeding dogs avocado entirely and instead choose safer treats. Avocado oil in very small amounts, when used in commercial dog foods, is considered safe. If a dog accidentally eats a small amount of avocado flesh, it is usually not serious, but consuming larger amounts or the pit warrants a vet consultation.