So it's either the biggest coincidence ever, or you are right about the dry food. 1st day today he was without it (although not happy about it!) and this is the first day his blood has been more normal readings. Highest reading was 11 and lowest was 6. So we are going to keep up with the no dry food for a while to see the result.
My mom keeps a detailed graph of his blood levels, the amount of insulin recieved and anything odd that happens... puking, constipation etc.
I will have to check which syringes she is using and he started on .5 unit of Caninsulin. He was switched to Pro-zinc at 2-3 units. We are going to talk to her about switching insulins. He is getting his blood checked 3-4 times a day now. Will keep you updated.