What is the most logical next event?

How to care for a diabetic dog
Make a plan for your dog's health with your vet.
Diabetes requires swift treatment, but the treatment plan depends on your dog's current health. Insulin is usually required, and the vet will determine the amount.
You also may have to make certain lifestyle changes. A long talk with a veterinarian is the first step A simple test can diagnose diabetes in your dog.