I'm going to be building a bunch of squirrel boxes for my kids this winter. We've always caught a few red squirrels in weasel boxes with two inch entry holes. I seem to have squirrel refusals fairly often, and wonder if it isn't that the hole is a bit smaller than they would like. I'm debating on cutting them at 2.5 inches, but if I do, we have to check them every day instead of every three days with a two inch hole. We usually check daily anyway, but it's nice having some cushion in case something comes up. Do any of you folks have an opinion on the matter?