Teaching Chickens Tricks

Scott has been teaching the chickens a trick. The trick is simply that they fly up to his arm to get a piece of bread. Dolley and Bess picked up on it right away (Bess in particular needs no encouragement to fly up to your arms or shoulders), but Eleanor can't seem to get airborne and Abigail would simply prefer the bread to be handed to her, thank you very much.

The problem is getting the girls to only do the trick on command. As it is, anytime they see Scott, they fly up and demand their bread. Another problem is getting them to actually hop back down after the trick is over. As far as they're concerned, they could spend the entire afternoon like this. Chickens don't really grasp the concept of doing something only once.