I really want to install a cat flap so I can get rid of litter trays for my two cats. Currently we let them in and out during the day and keep them in at night. However they are quite active hunters (mostly voles, the odd bird / rabbit / squirrel) and are usually quite keen to bring their 'gifts' inside. The back door opens straight into the kitchen so I don't really want them bringing things in there. Is there any way to stop them bringing things in if we have a cat flap? Does anyone else have a hunting cat with a cat flap, and if so how do you manage it?