1 unit would be a starting dose for a cat his size, on a low carb wet food or raw diet, if following the Tight Regulation protocol and newly diagnosed. But Jean Luc is not newly diagnosed. We do try to be a bit more aggressive in cats returning from the Falls. Did you follow Tight Regulation last time? Is it what you'd like to follow this time? The other dosing method used here now is Start Low Go Slow, which would have a lower starting dose of 0.5 units if on all low carb food.