Kitty presents or infestation?
Hopefully all the activity is outside--but in my experience, I wouldn't count on it. Amazing how they find ways to get in--they squeeze through the smallest openings. So be on the lookout--but again, hopefully they're all outside. (It took me a couple years to track their entry points, and hopefully eliminate the problem.)
-k2 in CO.
My cats would leave their "trophies" at the kitchen door and the sliding glass doors. Sometimes it was moles, sometimes mice, one time they left one in my shoe but usually at the entrances, where ( I think) they would know I would see it, sort of a present for me.
I always praised them when I found one.