About 3 weeks ago we had a cat flap fitted on an outside door. The last time I had a cat flap, I had three instances of the cats bringing in live prey in 5 years. I've now had three live mice in three weeks - all courtesy of a newer cat!
He's got to come through the outside cat flap and then through a second cat flap on the utility room door into the livingroom. Then he just drops the mouse who scuttles off to hide and he loses interest. I'm hoping we've found all the ones he's brought back 
Has anybody any ideas about how to disuade him from bringing mice into the living room? The outside cat flap is on a curfew (now set at 6pm!!) so he can't get out overnight but I'm not going to lock it permanently as that's not fair on the other cats (or using the cat flap for the reason I bought it). I'm thinking it's possible I might have to get a second microchip controlled cat flap for the utility room door and not program him into it but I wondered if anybody else has had success with other techniques?