Hi Kathy- Just getting caught up this morning...I think I would lower Oliver's dose to 0.25 (or as close as you can get and be consistent). He's still pretty new at this dance, and a lime green earns a full 0.25u reduction for newer kitties. I know he stayed blue last night, but he was still recovering from the higher carb food and the low number. As that extra sugar gets out of his system, 0.4u may be too much for him.