Yep, the joys of the litter tray... never mind, it won't be for long (my two darlings lasted just a few weeks before they virtually tore the kitchen door down trying to get out in that fabby wild place called my garden).... I'd had a new cat flap fitted and they could see through it but not get out.... then they'd jump up on kitchen worktops to see out through the kitchen windows (I really wasn't happy about that !)... The three of us were desperate for the *isolation* period to be over ! They'd both been microchipped, vaccinated, wormed, deflea'd etc etc and my garden was quite safe so I only let them out at first when they were really hungry - that way I knew I could entice them back indoors.
After they were used to going outdoors (but still came indoors to use their trays !), I moved the trays closer and closer to the back door then one day, put one on the other side of the door - ie outside and the next day put the other one half way down the garden. It did rain really heavily for a couple of days after that, so I simply brought one of the trays indoors again but as soon as it was dry, both trays went outside again. A few days later, I mixed some of the used litter in with some freshly dug garden earth and both of my darlings took the hint really easily. Voil� ! no litter trays again.