Jack is possibly insulin resistant. :-/

Jack now has Addison’s Disease due to not having enough cortisol. He had Cushing’s due to too much cortisol, but apparently the Mitotane killed too many cells in the adrenal gland, so now it’s not producing enough cortisol. He’ll be on an injection once a month for the rest of his life. We have to give him Prednisone to help restore cortisol. My poor guy, he is acting hungry and tired all of the time. I bought all of the testing supplies but still haven’t been able to get enough blood for the test strip. We got the Freestyle Libre 2 reader and sensor last week, it seems that the readings only go up to 400, so I have no idea how high his sugars are. Every time we check them, it’s at the max level of 400 on the reader. Once it did show 378 and another time 379. But other than that, it just shows HI and when I transfer the data, it shows he was exactly at 400 for all of the other tests. So I’m pretty sure it doesn’t read over 400. The vet believes he may be insulin resistant. I was thinking of purchasing the genteel device to use for testing. But what if that doesn’t work either? Then I’ll be out $70 on that. I already have the meter, test strips, lancing device and lancets not being used. It isn’t about the money, but I’ve spent close to $4k since he was diagnosed in January. My only other option would be to bring him to the vet to get tested once a week, they charge me $40 each time. But then that’s just sporadic testing and I’ll never know how his levels are at any other time. Even if I do test him and his levels are still high after taking 18U of insulin, what would I do? I already feel like he’s on a high dose. He seems miserable, he doesn’t want to play. He only gets up to eat, drink or go outside. We switched insulins from Vetsulin to Prozinc. We’re now at 18U twice a day and his reader still just shows HI. :-/ We’re injecting into the back of his neck area because that’s the only place we can get enough skin to tent. I feel like I’m failing him.