My two Shih Tzus have different styles. Shu-Shu will "fluff" the carpet pawing at it, go repeated in circles, fluff some more and then flops down. Lei-Lei will take a dog blanket and work it until she has a nice little ball...sometimes she puts her whole body on it and others just her head.I think all dogs do this, you know, genetics. Also if Shu Shu is fluffing on the couch, all the sofa pillows end up on the floor, she may or may not go to sleep, sometimes she will finish, lay down and look at like "What?"