not sure if this is the right place to post, but I just heard that plum pits are toxic to chickens. Is this true? My neighbor has about 5 plum trees that all hang over into my yard and right now the birds/squirrels are knocking the fruit down all over (especially in the coop area). I like that these trees provide shade for the coop, but do I need to go around and pick up every stray plum that falls??