They bring mice in, alive, and then lose them. I've had enough of it - I basically have to show them where the mouse is. Which would be OK, except I am a big girl's blouse when it comes to rodents and I shriek a lot.
This morning there was a mouse behind the fridge (you would not believe how quickly you can make two packed lunches and a coffee when there's a mouse behind the fridge) - Cat A wandered outside because he has the memory-span of a guppy, Cat B managed to catch it only because the mouse ran into her open mouth.
Does anyone have a cat which actually kills rodents efficiently?