@Nancy Freeman and HanSolo - Welcome to FDMB! This is quite literally the best place you never wanted to be.
You are also correct. The first few weeks of learning how to manage your cat's diabetes are overwhelming. That's the bad news. The good news is that we're here to help. The board has members from all over the world so there's usually someone around 24/7 if you have a question. Some of us have been here for many years paying what we learned forward and we have access to veterinary and medical libraries. There's a wealth of knowledge and support for you to draw upon.
We are strong proponents of home testing. It is the best way to keep your kitty safe. This is a link to
information on home testing. Many people here use the Walmart Relion brand meter. The cost for strips is very reasonable. Your met may suggest a pet meter. The strips for the pet meters run about $1.00 each. The cost for the Relion strips is about $0.17 each.
I'm not entirely sure what you're referring to as a Clip Pen. Do you mean a Kwik Pen? If so, that's one way that Novolin N is sold. Novolin is not a great insulin for cats. Since 2018, the
American Animal Hospital Assn has been recommending either Prozinc or Lantus (or a biosimilar/ generic form of glargine) for the treatment of feline diabetes. I've linked their guidelines. The information on treatment for cats begins on page 3. Kyle also gave you the reasons that we encourage you to use a syringe to administer insulin. We encourage dose changes in small increments (0.25 to 0.5u) and the pens dispense only in whole units.
We also encourage feeding your cat a low carbohydrate, canned food diet. Many people here use Friskies or Fancy Feast pate style food. We consider low carb to be under 10% although most people here feed their cats in the vicinity of 5% carb. This is a
chart that contains information on carbs and other nutritional values for most of the canned foods available in the US. You have lots of choices!
Just to overwhelm you a bit more, if I've not done so already with all of the links, this is a link to our
helping us to help you post. It gives instructions for how to begin -- setting up your signature, spreadsheet, and other helpful information.
@Drashiel - please be more specific in your comments. As Elise noted, you made a sweeping generalization that is not accurate. In some countries, Caninsulin/Vetsulin is the first line choice for insulin that vets are required to prescribe. This
was true in the UK and has changed and it sounds like it's the case in Spain. It is NOT the case in the US and, in fact, one of the major veterinary associations does not recommend Vetsulin for cats at all due to it being harsh, fast acting, and of insufficient duration for a cat's metabolic needs. The pens are also not useful for pets. You cannot calibrate the dose in small enough increments.