Hi- Monitoring the ferrets' glucose levels, as well as being able to establish patterns, is a great idea. Although, I'm not sure if the calibration would matter, or whether human or ferret blood would make a difference in its accuracy. If you haven't already, you could contact customer service, and someone there should be able to tell you. I also want to say that if you plan to use one of the many automatic lancet devices available, my personal suggestion is... DON'T! I was diagnosed twenty-nine years ago with Type I Diabetes. So far, after a pancreas transplant in January, I am insulin-free! I checked my level three to five times a day, every day. I always ended up with a long-lasting and very painful bruise. No matter the manufacturer, depth setting, etc. It hurts me to think of how a ferret would feel, only once a day. I pricked my fingertip manually. I just poked it with the lancet myself. Much less pain and trauma. It usually only took one try, too. As for clipping a nail to collect blood; I wouldn't, unless that was the only option. Luckily, I have never clipped an animal's nail short enough to cause it to bleed. However, I once cut our German Shepherd's nail a bit too short. She NEVER forgot it, and from then on it was a challenge every time. Sincerely, Sonya P.S. Don't know much about the laser meter, except that the manufacturer is somewhere in Arkansas, Little Rock, I think. I would guess that its somewhat expensive though. Seeing as how any "new" technology always is. [Posted in FML issue 2920]