One of my Brabanters can fly up to the edge of the brooder (about 2 ft high) & then dive-bombs down on top of the others. The other chicks have realized that I can lift them up to the edge of the brooder so that they can do the same. They now all mob my hand if I put it into the brooder, wanting to be picked up. It's better than treats! (& better than their sand box, which was the previous favorite) At first I was worried that they might get hurt, but they seem to be able to control their direction & speed.