6. Avocado
Avocado is the king of “healthy” foods right now. So is it safe for dogs? It depends on the part. The flesh contains persin — harmless to humans, but it can cause stomach upset, vomiting, and diarrhea in dogs.
Most dogs handle small amounts of flesh okay. The real danger is the pit — perfect size to get stuck in the throat or intestines, sometimes requiring surgery. The skin and leaves have even higher persin levels. A dropped slice? Probably fine. The pit, skin, or peel? Never. Up next — the obvious one with a twist most people miss.