Liv
I use those velcro strips with adhesive backing, very easy to apply.  You
could try the magnetic strips too.
 
Avoid the magnetic locks that are designed for cabinets.  They may keep
a door from swinging open, but aren't strong enough to stop a determined
ferret!
 
Linda Iroff
Oberlin, OH
 
Support the Ferrets Unlimited/Raisin Retreat Ferret Shelter by visiting
http://www.iGive.com/html/ssi.cfm?cid=3585&mid=30146
[Posted in FML issue 2837]