Hold Without Taking

I dreamt that I let a couple of cats outside. I then saw one of them, grey/gray, was lying vertically on the ground facing to the right, as if dead. Another cat was grabbing the stomach as if to bite and eat. I tried getting rid of the cat. It then went to the backside of the cat and vomited the guts of the other cat. I didn't see any puncture wounds, though. I was thinking that I shouldn't have let the cat outside.