Our wonderful little Rat Terrier, Buddy, has a verry cute habit. When he is tired or stressed, he fetches one of his toys, finds a quiet spot and gnaws or sucks on the toys head. (In one case , he found that a gooses rear end worked best!) He lapses into dreamland with his eyes closed in a trance like state. We call it "Buddy Bliss"
That is one contented dog!!