The following are personal notes from a single cat owner. They are not to be taken as general advice. Many would disagree with these conclusions. 1. Caninsulin has an interesting mechanism, which even though it is mostly long acting insulin, generally has an early peak in cats. My cat Butterscotch peaked anywhere between 3 and 4 hours, but from the peak, it took quite a while for his blood glucose to start the rise back up, generally after 6 hours. The graph below shows how the insulin is metabolized in most cats, and when it has been completely drawn in to the system. As you can see, the effect starts almost immediately, bringing levels down, and after two hours it steepens to peak drop at approx 4 hours. Then there is a nice flatter period of about 2 hours, after which the levels curve b