Feisty and her sister Fifi are STILL at our shelter! We have "tested" Feisty by placing the igloo into the back corner of the playpen over and over, and each time - she pushes it until she's able to high-tail it over the playpen door. She's VERY smart. I don't know if it qualifies as "using a tool," but you can tell that she is problem-solving. Tracy Tye Stephens Greater Chicago Ferret Association Vice President Shelter Management Team Volunteer Coordinator Sent via BlackBerry from T-Mobile [Posted in FML 7054]