This article keeps making the rounds. It's disheartening to see new chicken keepers try to get all of the do's and don'ts down exactly. The foods chickens can safely consume is so extensive, there is no need to even have a list. As far as avocados go on the naughty list, it's not true that avocado flesh contains the toxins found in other parts of the plant. And as far as the toxic "herbs" on the list go, don't feed them any plants that you wouldn't eat yourself. Actually, I've always known chickens to avoid eating anything that could make them sick.