I truly don't care if he eats them or not, so long as he removes them from the premises - and Greg B., the deadly properties of field mice are greatly overstated, at least around here, and the risks as assessed by several vets I've had are very low providing kitty is well immunized. I have owned, over the years, six mouse-eating cats, and not one has ever become ill. Matter of fact, all but one died of old age, and only one of them had any serious illnesses, and that one caught his illness at the vet's (a vet I had very, very briefly).

Liz the Squeak, I am not yet prepared to eat the mouse, although I may be just saying that to save face because I can't seem to catch it myself. He was too young to leave his mother, but it was one of those dire cases where he might not have been permitted to survive if I didn't take him. The owner stated he was seven weeks, but I suspect he was maybe six, as he was still only able to drink cat milk and eat very soggy bits of solid food.

The Fourth Leg: A Cat Detective Novel... we had one cat who we accused of laziness in the mousing department, until the morning we came downstairs to see three tails perfectly lined up on the kitchen floor. ;-)

WYSIWYG, that would likely work, but I might consider a second cat first! I'm hoping he'll yet figure it out himself.

I may have to resign myself to the purchase of the teeny dish and a matchbox litter tray.