We are new to keeping chickens and have just started letting our 10 week old chickens, 8 pullets and a cockerel forage during the day on our property which is about an acre and a half in the back that is fenced in with a 3ft fence. Things where going great! They really enjoyed being out and foraging and didn't wonder to far from the coop. However today they squeezed through underneath the gate in the morning and the neighbors had to chase them back into our yard. So this morning we spent time fixing the fence so they cannot fit underneath the gate but now I am worried that as they get bigger they will just fly over it! I really thought an acre and a half would be big enough for them and that they would stay pretty much within the fence line. Any advice on how to keep them in side our property line? I would really like to free range them but not at the expense of our neighors.