Last night I was doing my weekly chicken checks and while checking the vents of my chickens I saw somekind of parasitic insect on and around there vents, crawling into their feathers. I've tried looking for images to ID these critters but haven't come up with anything. They are very small, black, and look like a pencil dot (if you were to make a dot with a pencil on a piece of paper). I've seen fleas and I'm pretty sure that these are not fleas as they did not hop and all of the pictures of Lice I've come across are a brownish color. I dusted them all off with DE last night and am planning on picking up some Sevin today but I would like to have some idea of what I am dealing with. Could anyone clue me in on what these critters could be?