Thanks everyone! He has been doing great this past few days,and I spent time reading cat food labels at the pet store. Science Diet Senior seems to have the lowest protein content, and he likes it.
Pearl's Mom - Chow Chow is 1/2 Siamese - we also owned his brother for a number of years, but he was black & white, and had the long thin body of the Siamese. People usually ask if he's part Himalayan.