I have some chickens who are constantly fence jumping. I already sought advice on here. I tried some additions to the fence and each time, after a day or so, they would find a new way to fly over. Finally, I decided that whoever got caught outside the fence was getting a wing clipped before going back in. I have clipped one wing on 4 birds. 2 of these birds are STILL getting over the fence. Question is, if clipping one wing didn't work, will clipping both be more likely to work?