Diabetes is caused from poor production and functioning of insulin, a hormone made by the pancreas. Insulin’s job is to help move glucose from the blood into the body’s cells where it is then used for energy. Diabetes most commonly occurs in dogs at the age of 8 or 9 years old. Diabetes can be hereditary and is more common in females. Dog breeds especially prone to diabetes include Samoyeds, Cairn Terriers, Pugs, Toy Poodles and Miniature Schnauzers. Symptoms of diabetes include frequent thirst and increased urination, weight loss, fatigue, irritability, recurring infections, blurred vision, and slow-healing cuts or bruises.