Something I've found often helps when chickens are trying to walk through wire mesh instead of the open door (that they've usually used a hundred times before

) just to one side, is to stick my hand/leg/whatever through from the other side and then pull it back once they've noticed. Posting another chicken through and then calling them back works even better but there isn't always an amenable chicken in grabbing distance. Either way, it gives them something to follow when they're too focused on *getting over there* to stop and think for themselves.
I also make sure chicks are introduced to increasingly complicated obstacles in the first two weeks of their lives and that does seem to make a difference compared to ones that just started out in a fairly empty space. Someone posted a study about this on another thread recently iirc.