It would be best to give insulin to bring the blood glucose levels down to a safe level. After giving Dia-IonX for a while, some owners have reported that they have been able to reduce the insulin dosage and some have been able to stop giving it because their dog no longer needed it. However, each patient is unique and has its own set of circumstances. One cannot stop giving insulin until the body no longer requires an exogenous source. Along with giving insulin I would suggest you try Dia-IonX because it helps to control the symptoms of diabetes and its therapeutic mineral base helps activate the enzyme systems in the body that help with healing. In addition, I like to give digestive enzymes with each meal, MSM, a probiotic such as Purina's Forti Flora, and a fish oil supplement daily. Dia-IonX will help the body better utilize the other supplements for a faster response. In addition, make sure that you offer sufficient water free of chlorine and fluoride. I know you are busy, but a regular exercise schedule is also helpful in moving glucose from the blood and into the muscles which will reduce the blood glucose and would be good for both of you. (Our sister company HelloLife has human products that you might want to look at for yourself.)
It is important that you monitor the blood glucose levels so that you can ask adjust the insulin dosage when necessary. Please let us know how you progress and if you have any other questions. I would especially like to hear from you since you are a D.V.M. and it is interesting for me to communicate with someone who understands more.