I already posted in one of your other threads but I'll repeat here:
If you eliminate the dry food, you may well find that you have a DIET CONTROLLED cat. Just by switching to any of the inexpensive low carb wet foods, like Friskies pates, you could see a big improvement and the dose may drop down to a very low dose within a week of changing foods.
At such a high dose, and not home testing, it's a bit of a danger to lower the carbs and not adjust the insulin dose to match the improvement.
I think if you are to do testing in the evening before that shot, you may find your husband will come around and do at least the one test before the morning shot. It's worth a try.
You are paying way too much money on items like syringes, and advice was given where you can get much cheaper.
You are feeding expensive dry food, which may be the cause of the diabetes, so just switch to wet low carb and drop that dose to 1u.
To include some of your earlier post so that others know a bit more about your situation....
Going to try my kitty Zoey on some new food. I'm giving her another two months before we decided if we need to surrender her back. (We can't afford the insulin costs.) I think part of the problem she can't lose weight is she is eating the other cat's food (wilderness- 36% carbs- grain free... yeah right). Hers is the diabetic purina DM (13%). I found looking online that we can get her Wilderness Core (11%) carbs and just feed for both. That way she's getting less carbs. I don't have a meter at home but I'll decrease her insulin dose down. She gets 5-6U Lantus BID. (She's 20 lbs- Maine coon- ideal weight of 16). We'll see if that helps.
and
Part of the problem is my husband won't do home testing. I'm a medical resident and work 80hrs a week. I do her evening shot + food when I get home around 8pm. And we also have a 14 month little girl at home so it's difficult for him to take care of the cats + her. I want the best life for my cat. If I can't control her sugars well enough, I will return her back to her pure bread rescue so they can re adopt her out so someone else can. Because it's not fair for her. She is developing early catarcts as well (even I can see them with my opthalmoscope) and that's not common in cats.
Links were provided on diet, lowcarb food lists, and obesity, and many others.
If you were to switch to low carb wet food (for both cats), drop dose to 1u, and home test the results, you may find that you don't even need any insulin or the supplies! Many cats are DIET CONTROLLED, so try it. Home testing is not difficult, and you could always do the evening test, then maybe your husband will come around to do the am test before shot.
You have repeated that you are giving the cat 2months because that's how much insulin you have. If you are paying so much for your syringes as has been noted, it could be that you are also paying a crazy price for your insulin as well! What is your source for the Lantus and what is it costing you? I am positive there are others here who can tell you of MUCH cheaper sources, if you want to keep your cat.
If you don't want to try, then contact DCIN as has been advised so that maybe your cat can live.
I adopted my Oliver, from a family who did not want a diabetic cat, through DCIN; I feel so lucky to have saved him from being put to sleep, he is such a wonderful cat that I love dearly.