I have a small flock, a large part of which are guinea fowl. They are trying to fly, and that's not such a good idea where I live. I have seen the pictures of how and where to clip to keep them from flying, but every time I try to clip them, they put up so much of a fight that I can't hold them and clip them at the same time. Is there a reasonable approach to clipping them by myself, or do I need to enlist some help?