ok thanks- she is still very active and just ate on friday- it's only like once when she yawns, but it's not everyday. and she rarely leaves the warm side, so i dunno if the coolness got to her. but i will definately go get another uth and get that dimmer.the room she's in is the warmest in the house, but unfortunately also the largest. i just knew that yawning could mean an ri, but i wasn't sure if they just did it to stretch their jaws or something- i appreciate all the help