Hi Anna and Niutek and welcome to the forum.
I am sorry Niutek has not been well. We will try and help you all we can
First of all using a human meter is absolutely fine. Human meters do run lower than the Alphatrak but that doesn't mean they are not good. Most of us here use a human meter and our dosing methods are based on human meter numbers. But if you feel more comfortable using the Alphatrak that is fine too.
I think one of the first things you could do, so that we can help you is set up a spreadsheet and enter the last months BG numbers and insulin doses and anything else you think is relevant in the remarks column. I am going to tag
@Chris & China (GA) to help you with the SS.
Here is the link to the SS. Chris will be in contact with you.
http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/
Are you testing for ketones each day? It is really important to test for them daily following them appearing in the urine/blood to ensure they don't come back as they can progress to DKA quickly. You need a bottle of Ketostix which you can get from Walmart or a pharmacy.. collect a urine sample from Niutek and dip a test strip in. Read it against the colours on the side of the bottle exactly 15 seconds later. Anything above a trace needs vet attention.
It is also really important that Niutek is getting enough food. He needs more than he would normally eat to help prevent ketones reappearing. Food acts like a medicine with ketones. Feed before the insulin dose and during the cycles as much as he will eat. I'm glad his appetite is good.
Did he have an infection or inflammation at the time of the ketones appearing? And was this treated. It is very important also to have that treated.
Also getting enough insulin is also important in preventing ketones reappearing. Getting your SS up and running with the data will help us help you.
With the Lantus insulin, did you go straight from 3 to 5 units? We would not recommend you do that. It is better to go up slowly in 1/4 unit increments. If ketones are present we sometimes increase more quickly and in a larger increment but not from 3 to 5 units.
Who suggested giving the Humalog insulin as well. Was that the vet?
While we do sometimes give a fast acting insulin with Lantus to bring down the numbers in special cases, we start of with a very low dose and under the supervision of a very experienced person who understands the actions of both the insulins being given at the same time/during the same cycle . The person who I know who knows a lot about this is away for a week but I will tag
@Wendy&Neko
@Sienne and Gabby (GA) to see if they can help.
Keep asking lots of questions, we want to help all we can with your beautiful Niutek.
Here is a link which may be helpful
http://www.felinediabetes.com/FDMB/threads/new-how-you-can-help-us-help-you.216696/