“very dangerous” is a stretch. It’s mainly large quantities of dark chocolate we need to be concerned with. Milk chocolate won’t give them much more than a touch of diarrhea. Incomplete list of things that are way worse for dogs than chocolate: onions, garlic, lavender, grapes (especially raisins), xilitol (commonly found in peanut butter), avocado, cooked bones (especially poultry but any bone can become brittle when cooked).