What it often means
- Hunting instinct: it runs independently of hunger. A well-fed cat keeps stalking, catching and carrying prey, with the same drive that makes him chatter at birds.
- Back to safety: your home is the core of his territory, the place where he can deal with his catch under cover, even if he never eats it.
- Mother-cat behavior: mother cats bring prey to their kittens, first dead, then alive. Some see a lesson meant for you in it, without evidence.
- Live prey let go in the house: he stretches out the hunting sequence, probably because he is not hungry enough to finish it.