"experiments carried out with typical house mice show that adolescent mice can squeeze through a hole the size of a ballpoint pen, and adults can get through a hole the size of a dime. If the skull fits through, the whole mouse fits through."Hello I have been getting mice in my 2009 Tahoe need to figure out where there still getting in. I already fix the the vent above the tail lights and check the hvac air intake all have screens on them. Took the hole headliner off to check under it pain in the butt. Anybody have any other spots you think they could be getting in.