Hi, all. Wasn't really sure where to post this, so here goes. I have a tripod. He is 11 years old and has been missing his hind right limb since he was about 8 months old. He's done beautifully without it his entire life. Recently, though, he was diagnosed with diabetes. I've tried for years to maintain his weight but he does not like to play with any kind of toys (string, mice, mice on string, cat nip, remote controlled, you get the picture). During the time frame he was developing diabetes, he also started having loose stools and stopped using the litter box to poo. He would go on the floor in front of the litter box. I think it was because he sits down to go, and kept getting poo on his fur and subsequently got covered in litter. We dealt with the loose stools and tried to get him back in the box by cleaning the floor with enzyme cleaners and others. Nothing worked and he still goes on the floor in front of the box but his stools are more solid so I figured it is habit and just let him do his thing. However, he has started urinating on the floor as well. He laus down on his side to do all his business. He went from standing to do his business, to standing to pee and sitting to poo, to laying down on his side to do everything. I'm at a loss and dont know how to help the poor dude, or if old age, arthritis, and being overweight are just taking a toll on him. 

Any advice would be appreciated