There are many vegetables and fruits dog parents can safely share with their pooches, but avocados aren’t one of them. This is because the avocado plant, skin, pit and leaves contain a fungicidal toxin called persin that’s harmful for dogs. In large quantities, persin can cause vomiting in dogs and other unpleasant side effects like diarrhea. The pit is also a choking hazard and can block the digestive tract if swallowed whole.The good news...