Hi, my cat was recently diagnosed with FD. He is 10 yrs old and 17.5lbs. About 2 weeks ago I noticed him drinking and voiding more than normal. He has not seen a vet since he was a baby. He is inside only cat with no other indoor pets and no obvious health problems. Needless to say, getting him in a carrier and in a vet's office was extremely stressful for us both. He also had to be sedated for the exam and all other testing. Vet did labs and urinalysis (he did not have a UTI but glucose in urine was 1000mg/dl) and made diagnosis. He was diagnosed on 3/16/21. His glucose from his blood work was 477 and the ear prick at the vet's office was 546. Vet wanted to keep him and run glucose curve. Me and him were so stressed out from the dogs barking at the office that I refused to leave him and offered to do any glucose checks at home and manage this at home. So we were sent home with Vetsulin and instructed to check glucoses every 12 hrs and give 5 units of insulin every 12 hrs. His previous food was Pruina Pro Hairball Formula (which I now know is extremely high carb). The vet gave us Hills Science diet dry W/D (which I now know isn't much better). I had already started the new vet food and giving insulin injections before I found this site. I wish I had known SO much more before our trip to the vet. He ate the new food (Hills W/D) really good for a few days but basically is refusing it today and only ate about half yesterday. Vet wanted him swapped to completely Hill's on that day, so there was no slow transition of food. Glucose levels have been as follows: (I will work on a spreadsheet but needed help quicker than I can figure that out) 3/16: 9PM 454 (5 units given) 3/17: 9AM 292 (5 units given) then 9PM was 306 (5 units given). 3/18: 8:30 AM 374 (5 units given) [Previous readings were sent to vet's office who instructed me to increased to 7 units every 12 hrs] Next glucose check at 7PM was 513 and I gave 7 units. I rechecked it at 10PM and it was 392. 3/19: 5:30 AM 239 (5 units given as this was my first day to leave him I wasn't comfortable giving 7). At 8:15 PM glucose was 405 and I gave 7 units. 3/20: Since I would be home today I wanted to try a glucose curve and see exactly what has been happening. I felt like he was probably dropping during the day and then "bouncing" as I have read from different posts. 9AM - 252 10AM - 7 units of vetsulin given (a little late bc he was hiding under my bed) 11AM - 303 1PM - 123 2PM - 65 (asymptomatic - karo syrup on purina food because he still won't eat Hill's) 2:30PM - 73 3PM - 96 4PM - 128 (He has now started eating some of the Hill's that I had left out) I'm not sure how to fix this mess that we are in. I would like to switch him to low carb wet food but hate to make two different food swaps in such a short amount of time. Right now the only thing I know he will eat is his old purina food and may eat some of the Hill's. I can clearly see that this 7 units is way too high and I don't understand how the vet only wanted AM and PM readings to decide to increase his dose. I wish we could just start over but I'm not sure how. Please give any advice regarding how to manage from here - do I give any insulin tonight/tomorrow? When and how can I transition to a low carb food? I'm also not sure whether to tell the vet I won't be following his plan of find another vet. I hope this posts right as I have never used any type of forum but am desperate for help and what I have read on here seems to be more knowledgeable than my vet. Thanks in advance for any advice!