Hello All. I am in the process of building a duck run. It is 15' X10' and the has angled arches that are 6' high down the middle 4.5' of the run. My question is more about the roofing. Do I need to make sure that the top 3' are as predator proof as the sides? I will be using welded wire with 2x4" openings overlapped to create 1x2" holes on the sides. Will the welded wire be okay on the top without overlapping? Or could I overlap it with chicken wire? I'm trying to save a little on the cost. I know that some people just use mesh to keep predatory birds out but we have raccoons, possoms etc. down here. So I want to make sure it is predator proof. The way the sides are angled, any critter would need to climb straight up 3' then the beams are at a 45 degree angle for 4' then another 45 degree angle for 4.5' to the other side's angled uprights. Any help would be appreciated.