Hello again, and thanks for your additional information.
Yes, Min Pins ARE more predisposed to develop diabetes, and this is usually due to being good (big) eaters and becoming overweight. Overweight dogs are more prone to diabetes, so diet is very important.
Diabetes in dogs is almost always controlled with insulin. Dietary changes usually accompany the insulin injections, to reduce body weight and carb/fat intake, which turns to sugar in the body. A good food for a diabetic dog, is one that is high in protein and low in carbs and fat, with high fiber.
This should provide more helpful information:
Depending upon how high your dog's blood glucose reading was, your vet will prescribe the correct dosage of insulin, and/or discuss lowering her blood glucose with diet only. If insulin is definitely needed, please try not to worry too much. I have a diabetic cat, to whom I give two injections of insulin daily, and he was diagnosed 7 years ago. It's something you can learn to do with guidance from your vet and researching further sources re: canine diabetes, online.
I hope all will be well, and please let me know if you have any further questions.