We were letting our chickens free range in our 1 acre fenced back yard but they have recently been going into our neighbors yard and playing in their mulch, which clearly they don't appreciate. We put up 5 feet of chicken fencing around a 10 X 15 are but they keep getting out. Is it possible that they are flying over the fence? They would fly over the regular chain linked fence before but they would jump up and land on the pole. Now there is nothing to land on so I didn't think it was possible. Thank you for the help!