Thank you to everyone for all of your responses concerning the vents in my mobile home. I'm glad others live happily with their ferrets in mobile homes. A special thanks to Deb from Fuzzy Loving Ferrets for researching the issue of formaldihyde. I don't beleive I will have any problems with this in my home - it is not a 30 year old house. As for the person that did have a problem- you must have owned a very old home or you were a rare case. Thanks again- DOOKS and Kisses! Renessa [Posted in FML 7328]