My outside and/or feral cats have access to the garage which we heat in the winter. I have several litter boxes out there for them which they all use except this 5 month old kitten. He refuses to use it. He goes outside of the litter box. He sees the other cats using the litter box. I don't know what to do to get him to use the litter box. I was thinking about bring him inside as he is quite tame and gets along with other cats but I'm not going to bring him in if he won't use the litter box. Any advice would be greatly appreciated.