Thank you all for the replies. I appreciate it very very much.
I am going to drop him off this morning for the first of the 3 IV treatments. I will ask for a copy of the lab results then and post what I find. I don't know that the "bad" numbers were very high..
Kobe has not been his "normal" playful self for a few months now, but I had chalked that up to my recent move and the fact that he is getting older. He still runs to meet me every day I come home. Still jumps on counters and on tables (even if he isn't supposed to). He is skinner than ever, but my parents cat got skinner as she aged so I thought it was normal. He still uses the litter box. I had been feeding him science diet (elder cat formula whatever that is called) prior to him quitting eating that. Since then I had been feeding him a variety of soft food from friskies brand to science diet. Whatever he seemed to like best. His affection level is the same, but he much more subdued than normal. Again, i thought he was just getting older and calmer. I don't notice any seeming pain when he is picked up. Never noticed until really watching him last night, but he did seem to drink more at night.
I will say that looking back on it I feel I should have acted quicker. I have noticed what I thought was incrased urine in the litter box some time ago, but I didn't think much of it. I thought the non-eating was due to a toothache or moodyness (he did this before a few years back when he was sick of a certian brand). I thought the limp was just old joints. I feel like I have let him down by not acting sooner. His ailments all seem very obvious to me now in hindsight.
Dropping him off at the vet today is going to be difficult. I don't like the choice that is not inevitably in front of me.