He will be high for a bit until his digestive system passes them. I would also agree that administering the regular amount of insulin is best. Just test him if you can periodically to see if the insulin is pulling the numbers down, get him back on his food and regular schedule.
Stuff happens. I had one foster diabetic, Tristan, who was quite a devious and determined little devil that kept me on my toes. Tristan was quite sure that his diet should include dry kibbles, pizza, bread, wine, scotch and water and anything else that tempted his nose. He was also quite determined and devious at getting what he decided he wanted.
Now Woden, biscuits ARE yummy, but they are NOT good for you and will make you feel poorly. How's about asking Mommy for some nice chicken bits or dried tuna flakes instead?
