Hi and welcome Luke and Wally. It would be helpful to have more information on Wally, so we can help more effectively and see what's going on with him. The 2U twice a day is a high starting dose and raising it to 3U twice a day is a little alarming to me. Sometimes, too much insulin can look like not enough, I know it sounds crazy, but it's true. If you give a large dose, then the BG drops..kitty's body isn't used to a lower BG

and the liver releases hormones and glycogen to bring the BG back up to what he's used to (even though the BG might be too high). So please create a signature so we can see diagnosis date, weight, what he's eating, etc.
Setting up your signature (light grey text under a post). Here's how:
click on your name in the upper right corner of this page
click on "signature" in the menu that drops down
type the following in the box that opens: kitty's name/age/date of diabetes diagnosis/insulin you're using and dosage amount /glucose meter you're using/what (s)he eats/any other meds or health issues (s)he has. You can add your name, and a geographic location (sometimes the country/time zone matters) Be sure to SAVE when you are finished.
Another thing that will help us help you when you get started consistently BG testing at home is to set up a spreadsheet like the one we use here. You will see how the trends and patterns emerge, and members can review his progress before offering suggestions or advice:
SPREADSHEET INSTRUCTIONS
UNDERSTANDING THE SPREADSHEET
Testing is a process of practice and patience. It takes awhile for the ears to "learn to bleed", as the more you test, the more capillaries form in the testing area, enabling you to get that blood drop easier. Here is a link to testing tips and videos:
http://www.felinediabetes.com/FDMB/threads/hometesting-links-and-tips.287/
and a great on by one of our members: How to test your cat's bg at home:
Video I made showing how to test your cat's blood sugar
It's very important to test before every injection, then again during the 12 hour cycle between shots. Please visit the Lantus forum
HERE and read the yellow tagged stickies at the top of the page. Very important information for all Lantus users to know.
We would like to help you help Wally to a good regulating dose of insulin and will help you work on testing, plus...if needed see if adjustments need to be made to his diet.