I have 5 lovely hens 4 sussex star and 1 bebcock. But we have just bought them. when we went to put them back in the coop everything seemed fine. no chickens opened up the hatch and had a quick peek. could see 3 chickens (i thought the other 2 must be in the somewere) so i left it. came back in the morning opened up the coop 3 came out, we were really worried so i looked around the filed. went all the way round couldent find them then suddenly they juped out of a tree next to it. they had somehow jumped over our fence and into a tree. It took us 4 houres to get all the cickens back into the coop. Is there anything i can do from keeping my hens from jumping out? We have already doubled the size of the pen and moved the coop away from the edges but were still a bit worried!