Excessive thirst and frequent urination are common reasons owners first suspect diabetes in a dog. They require veterinary testing, but the urgency depends on how the dog is acting. Vomiting, profound weakness, or breathing changes can signal a metabolic emergency rather than uncomplicated diabetes.
Book a veterinary appointment promptly for these changes
Drinking much more than usual, passing large amounts of urine, losing weight despite a good appetite, or developing cloudy eyes should prompt a visit. Similar signs can come from kidney disease, hormonal disorders, and urinary conditions. Diagnosis requires compatible clinical signs and laboratory evidence, including blood glucose and urine glucose.
Go to emergency care if your dog becomes very ill
A diabetic dog that is vomiting, not eating, severely weak, dehydrated, breathing abnormally, or collapsing needs immediate veterinary assessment. These can be signs of diabetic ketoacidosis (DKA), a potentially life-threatening complication that needs hospital treatment. Do not attempt to correct it by giving extra insulin or large amounts of food at home.
Low blood sugar is a separate emergency
For dogs already receiving insulin, hypoglycemia may cause shaking, stumbling, confusion, seizures, or collapse. Follow the specific emergency plan from your veterinarian and seek emergency care for severe symptoms. Never give insulin during a suspected low-glucose crisis unless a veterinarian directs you to.
What the veterinary team checks
An examination and tests may assess blood glucose, urine glucose and ketones, electrolytes, hydration, kidney values, and acid-base status. Other illnesses such as pancreatitis or infection can complicate diabetes control. The clinic may recommend hospitalization when the dog is severely ill.
How to prepare without delaying care
Bring the insulin name, exact timing of recent doses, food intake, home glucose data, and a list of other medications. If a dog is weak or collapsed, prioritize transport over collecting perfect records.
For stable pets, see home diabetes care and insulin safety. Sources: AAHA 2026 diagnosis guidance and AAHA DKA guidance. This is general education and not emergency treatment instructions.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.