New to the board. My senior cat (15 1/2 yrs old) was diagnosed with diabetes last month and started on Lantus (via AllStar Pro pen) over the Christmas holidays. We started with 2 units a.m. and p.m. with daily BG monitoring pre-shot and mid-cycle, and a curve on day 9. Based on the early numbers, my vet recommended reducing her to 1 unit a.m. and p.m. After a week on a single unit, I noticed an increase in her urine output, so I worried that she wasn't getting enough insulin. I should point out here that my vet said I could stop the daily BG testing (because my cat was trying to run and hide at meal times) and we would do a curve at 10 days. At the same time, I learned that "priming" the pen was recommended, so I started doing a test shot into the air before each injection. When I test with 2 units, there's a noticeable stream coming from the pen, but when I test with 1 unit, there are literally 4-5 droplets coming from the pen, and it takes several seconds for them to come out. This happens with EVERY test shot. So now I suspect the pen is not fully dispensing single-unit doses. I did another curve yesterday. Based on those results, my vet shares my concern and wants me to switch to syringes, which I'm willing to do, but I have read they are less accurate than the pen. Have any of you experienced problems with pens dispensing single units?