Hey I don't see the mice moving. One can only assume they are dead and being kept as presents for you.

i love photos of slightly confused cats

I think one of those "mice" is actually a ratpad.

They're all missing their tail, so he must be doing something.

Hey, that's a track pad!

The cat invited the mice to hang out on his cat bed. What more do you expect??

Check their tails don't get tangled (it's really easy with this breed) or you might get some mouse kings