I have one little female that snores like snuffleupagus, and LOUD, so loud I can usually hear her in another room. lol

She seems to sleep ever so deeply but I've never heard her hiss while sleeping, she meows like she's hurt sometimes, sometimes that doesnt even wake her up, other times it's like she's frantic calling/looking for me, and immediately calms down when I say her name and let her know I'm there.

Maybe bad dreams I dont know.