Just lately Noah has been reacting more, like an annoying twitch, when I inject. Could the cold be bothering him now when it never did before? I've always poked him in the hind quarters. I'm also leery of "Injecting into muscle mass makes the insulin absorb quicker". How much effect does that really have? Caninsulin is not an immediate insulin, right? He also has some scar tissue where I don't get that feeling that the needle has definitely broken through.