Coke is such a happy camper that it's hard to remember that he is so sick. Other than the weight loss he looks fine. He is alert, his coat is wonderful and he loves having visitors. He purrs, plays and cuddles as usual. So long as he is not in pain or having other dificulties I will keep trying. Hopefully in 2 1/2 months I will get his blood tested again and see if I have managed to slow things down.
In the mean time, he is a very happy and affectionate kitty. Did I mention smart too? He has adapted to coming and asking to be fed quite well.