My pit Sasha used to run in her sleep when she was a puppy. Sometimes she still twitches a bit and sometimes she even barks in her sleep with her mouth closed so it’s muffled. I think it’s so cute. There are times when I wake her though, like when we’re in bed and her twitching or noises wake me up. I’ll say her name and nudge her and she’ll re-adjust and sleep quietly after that.