Sleep Shifting

Well if people can sleep walk why can't shifters sleep shift. That would so suck cause in about half the books with shifters they don't remember what they do when they aren't human. People almost never remember what they do when they sleep walk. So it's highly unlikely that shifters would remember what happened. They'd probably just wake up somewhere else possibly with blood on them if they hunted (I do mean rabbit or deer). Can you imagine the problems it might cause if there was some kind of attack on a person? It would be bad for the shifter that's for sure.