What a useful thread! I knew that onions and garlic were poisonous to dogs, but not avocado! My dog ( Molly the border collie) is very greedy and will eat anything she can get her paws on- when I walk her I have to keep an eye out for anything lying around that she might eat, it could be anything! I don`t know how to stop her, apart from getting a muzzle, which I don`t want to resort to. I worry that she`ll pick up something that will make her ill. Although at 14, she`s probably too old to change.