Mine is dutch doors. They allow me to quickly shut in ferrets (faster than the sliding plexiglass barrier we also have) while being able to observe, and having one in front of the washer and drier closet permits easy use of the drier without even opening the bottom of the door. We are planning one on the pantry door, too, with the things we use most often to be on the upper shelves. Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/ http://www.ferrethealth.msu.edu/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html all ferret topics: http://listserv.ferretmailinglist.org/archives/ferret-search.html "All hail the procrastinators for they shall rule the world tomorrow." (2010, Steve Crandall) [Posted in FML 6798]