I'd be inclined to ignore the 0 result. If anyone or any animal had a bloood sugar of zero they'd be dead or in a serious coma. Lab error? misprint?
usually the blood sugar meters u use with a pin prick and then a droplet of blood correspond fairly closely to the lab blood test results. Depends on how regulary the meter is callibrated tho, I've seen on a couple of occasions ( in people, out of about 50, mind u!) variations of up to 3.0 comparing meter readings to lab readings from blood taken at the same time
Wait and see what it shows tomorrow