Hi, I have a 7ft wall around my garden so the hens should not get out, we clipped one of there wings and were keeping them free range at the top of our garden that is fenced off with a small wall and trellace up to about 5ft but now my hens are climbing over it all the time, we are going to attatch some mesh to the top of the trellace but other than making our garden even more of a prison camp is there anything that may repell the hens from certain areas? :