Can someone just remind me the best way to move from using an indoor litter tray to going in the garden please? Haven't done it for a few years and can't remember what I did before. Cat is now six months and in the last few weeks has been allowed out (he's in at night). We need him to stop using the litter tray during the day.....should I put some used litter in the garden where we want him to go and then remove the tray in the day?.. I'm not sure....suggestions gratefully received! We have seen him wee outside (on the gravel beds) but not poo.