When Nikko is resting, I often notice that his legs start kicking (just a bit, not wildly), his whiskers start flicking back and forth, his ears start twitching, and sometimes his entire body will lightly shake. I assume that he is in some deep dream state, perhaps chasing a rodent or spying on a bird and his body and muscles are reacting to the stimuli. Is this true, do cats dream like humans?