My 16-17 year old boy has been slowly becoming less and less of himself over the last year or two. In the last year he has quit bathing himself for the most part, requiring us to trim his hair every couple months and bathe him regularly. He apparently was having some difficulty getting into his litter box so we bought him one that was easier for him to step into. About six months ago we adopted another special needs senior. They seem to get along but aren't what I would call "bonded". It now seems that our old boy has recently started urinating on our clothes, couch, and occasionally on the floor. Sometime last night he pooped on the couch and urinated on a blanket that was also there. They have both been neutered for several years so I don't believe that it's an issue of territory. He has also recently started hissing and swiping at our other kitty and even my husband. This is not at all typical for him. He still tolerates my 3-year-old son cuddling him and loving on him but I am worried that my old boy may hurt my son without even meaning to. I would really appreciate any advice. I'm not sure if I'm ready to make this decision.