I tried and tried to litter train Addo (still in progress... and failing) from 6 weeks, but he is 6 months now and still a messy pup.
Edgar however always kind of did it! I helped by getting a BIG litter tray for the corner, and putting all his droppings in there after he did them. After a while he started going in there to do his business!
Also just while we're on this thread, Ed seems to pee in his litter tray too. I thought someone told me rats had no bladder control, but seriously he pees in it ALL the time, there is never any mess anywhere else!
im trying to litter train my two rattys and what i do is take all waste and wet litter and put it into the litter box(my crazzy rats pee beside the litter box. :lol: all i gotta do now is either get a bigger one or try to convince them to go in the litter box :wink: ). if your going to to litter train them you probably should start right away that way they will be trained sooner rather than later.