here are some links-
http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=2214 this one reviews pancreatitis in dogs
http://www.veterinarypartner.com/Content.plx?P=A&A=605&S=0&EVetID=0 this one demonstrates blood sugar testing in the cat- the equipment and technique is used. When using a very tiny lancet or needle to prick the skin, the patient can usually be easily distracted with a treat, scratching somewhere else on the body, or-my favorite- loud singing-maybe Frank Sinatra "Fly me to the moon.." DOn't laugh or think my loony it really does work.
In dogs, the ears may work depending on size, the foot pads can work but most dog's hate having their get touched. somewhere on the lips is good, lower lip on skin edge-not where moist with saliva.
So I often have these dogs hospitalized for injectable pain mens, anti vomit meds, and fluids while giving the intestines a rest. Feeding
very small amounts of something like Ensure will nourish the gut with less chance of upsetting it- this is if a diabetic dog can have glucose checked often. it is a slight balancing act but can be treated if careful and aggressive enough.
If days are going by and vomiting still happens, she made need 25 hour care. Is there an emergency clinic near you? they are usually open 24/7
much luck to you.
MORE- don't give rimadyl, it is much more likely to upset the stomach. if there were black stools she should not be on any related drug and the metoclopramide should be reconsidered. If it is making her very drowsy talk to your vet about decreasing the dose. try to wet down the hait on the ear with some rubbing alcohol- it may make it easier to see the veins especially under the ear flap. hold it up to a light, that may help. just look at the vein don't stick it after all that playing with the ear, wait a bit.