Hi and welcome! I'm glad you're researching and you found us.
Larry made some good points. There are better foods out there for you to choose, which are wet and lower in carbs. Wet food is good for kitties and the low carb is fine for all of them. You don't need to buy any fancy brands like Science Diet, which is exactly what I was feeding my kitties when Calliope was diagnosed. I returned all the fancy schmantzy foods to the vet and bought the low carb fancy feast grain free flavors and moved all 4 of my kitties to that. There are various brands of low carb foods to choose from. We generally recommend under 10 carbs and you can look at food lists under the nutrition thread here.
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Look for Janet and Binky's food lists.
Calliope was also on lantus, but the food switch made a world of difference and we were off the insulin in less than 3 weeks. Many kitties see lower blood sugar numbers when they go to low carb wet foods.
Great that you are hometesting!!! That's such a key to this. You definitely do not need to buy the expensive alpha trak meter, but not all vets are aware that human glucometers work well enough.
How often do you test between cycles and do you test before shooting?
I wouldn't write your vet off just yet. I disagreed with my vet on many things and now she calls me for my low carb wet food list after she recommended the science diet at diagnosis. She swore that what I fed wouldn't make any difference. I made a believer out of her when Calliope went into remission. I didn't agree with her on the starting dose either. I started at 1u bid and she wanted me to start at 4u bid. I never went higher than 1u. I think she simply hadn't treated many diabetic cats, so we both learned some things together and I still use her because there are other things I like about her. You may well teach your own vet some tricks of the trade by the time it's all said and done! Then, another kitty will benefit.
What dose are you own and when did you start with lantus?
When you say you want your vet to treat this more aggressively, I'm not sure I know what you mean. I think switching to low carb wet foods could be described at aggressively dealing with FD. However, with lantus, most folks start low and go slow. Lantus must settle and holding doses for periods of time to determine how the kitty does on them is usually the course of action with that insulin. Lantus likes consistency.
You can go to the board index and click on "lantus" under "insulin support groups" and read the stickies on lantus to learn more about how it works and how doses are decided upon.
Also read about handling the insulin.
I have a feeling your lantus could have gotten old and lost it's zest. Lantus is a human insulin and most humans go through a vial in no more than 30 days. Once opened, lantus tends to start losing it's strength after 30 days. Some people can get more days from it, but 30 days is generally about as long as it lasts in most cases. Also, it shouldn't be rolled or shaken and no air should be squirted into the bottle. It's somewhat delicate.
One reason the folks are now buying the lantus pens rather than the vials is that while they are more expensive up front, they get much more life out of them, as Larry pointed out, since you're not opening a vial at one time. These are smaller amounts, so rather than getting one month out of a vial, you can get a lot more time between purchases with the pens. The pens are discussed in the lantus stickies I mentioned earlier.
When you read the stickies on lantus and the health links, do note the information on hypos. It's really smart to have the tools on hand just in case your kitty suddenly goes lower than a comfortable level. It can save you a trip to the ER.
Ask whatever questions you have and folks will come around to help you. You're in a good place. This forum saved Calliope's life. Gave me another year and a half with her that I wouldn't have had before she went into unrelated kidney failure.
Welcome aboard!