I have a Tomahawk trap that I love and I recently purchased the "kitten screen" for it. It is to keep big cats from triggering it if you are just going after the kittens (I am trying to get the kitten before I get mom). I put the screen into the trap and my concern is that the opening looks awfully small. Maybe 3 inches by 3 inches. Can a kitten fit through that ok? I would estimate these kittens to be around 7 weeks old.