If it was Pearl, the Pea Fiber would raise her BG. When I was doing the food experiments earlier this summer (because her wonderful food was discontinued), I would write on her ss when she got the new food and what it was. Her BG was predictable enough that when it shot up, I could easily relate it to which food I was trying.
Another thing (and I don't know much about GAs), but the Guaranteed Analysis on the package only adds up to about 65, not 100. So, my question would be what is the rest comprised of?
Perhaps it would help to write on Molly's ss when she gets the treats and how many. I think you'll be able to see clearly what is going on within a couple of days, if her BG patterns look normal or screwed up