If I hear my cat in the other room where his litter box is, scraping around then he is taking a dump.
Then afterwards he sprints across the living room happy as hell.
Happens like clockwork.
My female pitbull is very "humanized" and if she gets annoyed or is tired and lays down she'll sigh super loud or really quietly lick her lips when she is really comfortable.
OH.. lol! For some reason probably every other night or so if she is sleeping really hard she will dream she is nursing and her tongue will be hanging out like just a half inch. Its hilarious. I got a pic somewhere of me waking her up while she is doing it, so her eyes are open but her tongue is still sticking out. Kinda funny. I'll post it if I get time.