We have a pet chick, one who was chased away by his mother. We brought him in the house and have been taking care of him until he's old enough to be with the rest of the flock. He's about half grown now. So here's the thing: he's scratching me. And not attacking me; I kneel down and he nudges my leg with his beak. Then he reaches out a leg and starts scratching at my pants like he would with a patch of dirt. It's not a big deal. It's actually kind of cute. I'm just trying to figure out why the heck he does it.