text:  the cat is used to going outside so what i would do is i would bring in another litter box but instead of putting litter i might put a little drop of litter on the bottom but i would put dirt and grass from the outside area where the cat hangs out in the litter box so the cat learns that the litter box is where to go and therefore little by little you can start removing the dirt and the grass and start adding more litter and make the conversion into having to use the litter box on a regular basis