My cat had a hypo. episode last night. Low reading of 26 was only 2 hours after insulin dose of 5 units. Got him back to 256 four hours later (food and Karo) Today, I did not give him any insulin in the morning. Tested him at 6 PM and his reading was 444. Gave him 4 units 2 hours later (8 PM) Tested at 10:45 PM and he was down to 85. He is on Novolin N. I am so scared that he will go hypo. again. I need some sleep tonight! Anyway, wondered if the drop from 444 to 85 in such a short time seems worriesome. Talked to vet today and he said to keep his dose at 5 units and test several times a day. With such a huge up and down in his readings, I am not sure what to do. He has been on insulin for about six years and he is 16 years old.