Welcome to FDMB Christine and sweet Onyx.
Testing is always important since response to insulin can change on a daily basis even with the same dose. Since insulin is a hormone the amount of absorption can vary and a kitties body can respond differently. With a harsher fast acting insulin like Caninsulin/Vetsulin it is very important to get a preshot reading as well as readings at +2, +4 and even +6 hours after the shot to see when the lowest point actually is and how fast the numbers drop. Because Caninsulin can drop the glucose numbers a lot in the first few hours after an injection it is important to know that the glucose number is safe before giving a shot and the other tests are to make sure the numbers do not drop too low.
I am in Winnipeg, Manitoba and I use both the Alpha Trak 2 pet meter and the Free Style Lite human meter. For myself I buy my Free Style Lite testing supplies at Shoppers Drug Mart. In Manitoba (and most likely BC) they have a seniors day every Thursday, where you can get 20% off regularly priced items, which includes the test strips. You need to be 55 and have a Shoppers Optimum card which is easy to register with. If you are not 55 then you can get someone who is to purchase the strips for you. About every 5 or 6 weeks they also have a "spend $50 get a $10 gift card" event on senior's day as well.. On these days I buy as many packs of strips as I can. You buy each one separately and get a $10 card which you use on the next box and so on and so on. Plus you get Shoppers Optimum points. Last year I was able to get $500 of product for free with the points.
Example: (Price check different Shoppers as here the prices can vary between different location)
Regular price $79.99/100
With seniors discount $63.99
With seniors discount and $10 gift card $53.99
We have another member in North Vancouver
@Wendy&Neko who has said she gets the best price at Safeway. Here Safeway is more expensive, but in BC it may be that Safeway has better prices. At Safeway you would get Air Miles points which you can use for gas/groceries at various places. I don't know if Air Miles points can be used at the Safeway pharmacy?? Maybe Wendy will be able to tell you.
Also setting up a spreadsheet will be very helpful to get an idea on how well the Caninsulin is working for Onyx. Here is a link to setting up a spreadsheet:
http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/
Being in Canada we are able to get human insulins at very good prices compared to what the US people pay. I don't know what you pay for Caninsulin or what size container you have, but if you need to change to a gentler, longer lasting insulin like Lantus or Levemir the prices are really not bad at all. I have two kitties on Levemir with a combined usage between them of 7 units (for 2 kitties) twice a day and my costs are about $25/month using the penfill cartridges.