When my dog was a pup she actually got into some mushrooms and nearly died. 2 years after that she got into some onions and left a mess out of her backside thru the house that looked like a crime scene. Apparently she wised up after those 2 incidents and doesn't touch anything other than her food or what we're eating. I do know a guy who lost a dog to algae in a stagnant water hole...nasty stuff.