I’m at a friend’s place and the cat keeps bringing in dead (or half-dead) animals into the house. It’s my understanding that cats think we are big, helpless kittens that don’t know how to hunt. Hence, they think they are doing us a favour.
It seems like a few mice actually escaped and found refuge in some walls in the house, so these “presents” are actually more than just annoying (and smelly if the dead animal ends up behind the couch).
Did the cat choose of it’s own free will to come live with your friend?
If not, your friend is already responsible for a domestic animal they chose to acquire. That comes with responsibility. Domestic cats aren’t compatible with the outside environment and cause ecological damage.