I have a flock of 10 white leghorns hens that we sometimes let out and roam the backyard. They have started flying on top of the six foot fence that separate our backyard with our neighbors. Today we found one of our chicks had her legs tied together with thread. Also we found posted on our front door the Fort Worth Rooster/Fowl Requirements code compliance flyer. Now putting the two together I am thinking one of the neighbors found one of our girls in their backyard and almost crippled her by tying sewing thread around her legs then threw her back over the fence. Such horror. Luckily we found her later that morning and untied her legs. She limped along all day. I have been thinking of clipping their primary feathers, but it is winter now and the temp is getting below freezing most nights. I have also heard that these are their keep warm feathers. Should I wait till spring and keep them in the pen all the time?