Scientists have found out that animals dream as well , you can read about it whatdoanimalsdreamabout though I have to warn you that they talk about a pretty cruel animal experiment done in the 60 s . They seem to mostly dream about their awake time . It ' s possible your cat dreamed about something that happened to him when he was awake , something that startled him or made him uncomfortable maybe ? I ' ve seen my own cat move his limbs in a weird fashion while he was asleep , as if he was fighting or trying to free himself from something . I woke him up in a calm and gentle manner but he still let out a surprised mrreow when he realized where he was . He sometimes also does other things in his sleep , running or breathing as if he was following the scent of prey for example . He ' s always confused if I unintentionally wake him up . I ' d really like to know what ' s going on when he ' s asleep and if he realizes that he was dreaming .