Bless your heart, Ronni
What do the strips tell you? Probably how much sugar is dumping, but how does that relate to BGs. Twice Andre has been tested and twice no sugar in urine even though his number in the 400s. So, it sounds like he is not a candidate for this type of testing.
Now, let me say this..talked to one of my vets yesterday. She said it does not matter because it will read the highest reading and it would be him. Again, he has showed no urine. This same vet is pretty up on things. She is happy checking him every two weeks and adjusting doses accordingly. In the meantime see if there are increases or decreases of urine in the litter box.
Now, one problem among others, his best buddy is Toby a twelve year old male who once was the king of tomcats in the area in which I live. Toby is massive and tight as a drum. I cannot get a pinch of skin anywhere. He is a wonderful boy and loves to be petted, but don't try and hold him or touch his ears! He is so big I had to test him to see if he was DM due to his weight as he could be part of the flooding. Well, it was a tooth and nail battle. I can't do this to Andre because he is recovering from illness and still a bit weak, but Toby is strong so I can lay on him. It was still difficult and took several tries and much foul language. I was both happy and shocked to see a reading of 69. Now, my hands were full of blood and so were his ears, but I expect the reading was accurate enough.
Also, I originally tested my first sugarcat by reporting the wet litter amounts and the doc would raise or lower the amounts of insulin until I found this site in 2008.
Thanks for the advice.