A final post on this to follow through on what I've read here. Thanks to TMNFarm for asking what I was already wondering. The night before last my husband and I clipped our turkeys 1 wing. It was very sad for me because they had a hard time flying up to their roost but they have stayed in the fence. The question that was asked in the beginning about whether or not to let them roost outside; I've decided that I will always put them in. I don't want to lose them. If I can find them, in they'll go. I'm sure that it is only a matter of time before they will figure out how to compensate with the clipped wing, but for now we are good. Thanks for all the answers.