I found this free pattern on http://www.homesteadingtoday.com, from "Wisconsin Ann". It has come to my attention that the thread we usually point to with the pattern for a chicken apron/saddle has broken links in it now so, I found the pattern on my harddrive, and here it is! I think. I know this one works, 'cuz I've used it. Cut on the fold (the narrow "neck" end is the fold) and turn thru the unstitched area on the butt. Add either an elastic or a 1/3"ish wide twilltape/belting/whatever you have as armholes...attached at the foldline/neck, and the other end to the wide area. Most hens will wear them quite happily. They seem to adjust them a bit when you first put them on, then forget about them. I'll keep trying to find more on the pattern.