"Dog insulin" refers to a type of medication that helps regulate the blood sugar levels specifically in dogs. It is used to treat diabetes in dogs, just like how humans use insulin to manage their diabetes. Full definition
Insulin is a simple molecule but it does differ slightly between species (i.e., cat insulin is different from dog insulin, which is different from human insulin). (vin.com)
Composition of dietary fat affects blood pressure and insulin responses to dietary obesity in the dog (academic.oup.com)
As your veterinarian will explain, it's important to always give your dog insulin at the same time every day and feed him regular meals in conjunction with his medication. (pets.webmd.com)