So new development in the My Crazy Chicks saga - at least two of them (Gertrude the Great and Phillipa the Proud) can now jump/flap/fly to the top of their waterers/feeders. The pic is of Gertrude - the little box she's after on the wall there is filled with delicious crickets. When Phillipa jumped/flapped/flew in front of me, I had that little box on top of the feeder, and she landed on top of that! I just don't want them to get out of their brooder. Should I just make the walls a bit higher, or am I supposed to clip their wings, or what?