I have never had a problem with my doorway ferret barriers. I use a piece of plexiglass, cut to around knee height. I run a groove down the middle of 1" by 1/2" wood strips to make a track, but if you don't have woodworking equipment, you can just cut the plexiglass to slightly wider than the doorway, so the tension will keep it in place. It's easy to step over and can be removed when not needed. If you've got a jumper, a piece of garden hose, PVC or plastic tubing can be split down the center and glued over the top of the barrier. This gives the top edge a rounded surface so they can't get a good grip when they jump for it. I also put a strip of dark tape on the clear surface to deter them from running into it. The clear plastic prevents anyone from getting stepped on by a large black lab friend whom we allow to jump the barriers. Lynn Burroughs Magill (the demon beast) Guinness (the neurotic sissy-boy) [Posted in FML issue 0979]