I get Christmas presents all year round from my two cats. They bring in mice, voles, shrews, rats and birds. When they were young, the two of them managed to drag a partridge in through the cat flap! A couple of days ago, Winnie brought in a tiny shrew. Its body was only about a cm long. He let it go in the kitchen and it run under the door and into the cloakroom. We haven't seen it since. I am not too bothered about tiny shrews but when they bring in live rats, that's a different matter. About a year or two ago, they bought a rat indoors and then lost it. A few days later I saw it sitting on the TV table in the lounge. I bought the cats in and they caught it.
Our cats also love cardboard boxes but I still buy them some treats for Christmas. When it starts to get dark, I open the door, call their names and shout treats. This always brings them in straight away and once the cat flap is locked, they are in for the night.