Yes. The avocado has insecticidal properties. When applied to an animal’s skin, it can actually kill the animal it comes in contact with.
Long Answer= The avocado has insecticidal properties which are not safe for dogs to ingest or come into contact with. As a matter of fact, even if the fruit is covered in latex, it can still be toxic because insects lick or bite into the latex to taste its fluids and then may be poisoned by saliva that contains toxins from the leaves, fruit and bark of avocados These substances interfere with their nerves and even destroy nerve cells
So as far as how much avocado would only depend on how many bites/licks your dog ingests before they realize…