i don't know why but everytime we clean and vacuum the house, she goes out and does this...yes, rolls around and covers herslef in dry grass from the backyard!!!! i think she gets jelous because she thinks we give the carpet more attention. so we decided to show her that we love her just as much, so we vacuumed her as well. she didn't act like she liked it but she definitely got the attention she wanted. turns out that she really needed one cuz bunch of dust bunnies came out of her also. ha ha i can't believe we actually did this to her, it' so funny since i've never done this to a dog before.