Diabetes in dogs
Diabetes mellitus in dogs happens when the body can't make enough insulin, so sugar builds up in the blood. Dogs almost always need insulin.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Drinking and peeing a lot
- Weight loss despite a good appetite
- Cloudy eyes (cataracts)
- Tiredness
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
Your vet finds high blood sugar and sugar in the urine. More bloodwork checks for related problems like pancreatitis or Cushing's. [2]
How it's treated
Treatment means insulin injections twice a day, a consistent diet and regular glucose checks. Your vet adjusts the insulin over time. [2]
Medicines your vet may mention: NPH insulin (Humulin N, Novolin N), Insulin glargine (Lantus). We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $200–$500 | [1] |
| Ongoing treatment, per month | $40–$150 | [1] |
| First-year total | $1,000–$3,000 | [1] |
| Each year after that | $800–$2,500 | [1] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Most diabetic dogs do well with routine care. Many develop cataracts, which can be treated with surgery. [2]
Common questions
What is diabetes in dogs?
Diabetes mellitus in dogs happens when the body can't make enough insulin, so sugar builds up in the blood. Dogs almost always need insulin.
What are the signs of diabetes?
Common signs include: drinking and peeing a lot, weight loss despite a good appetite, cloudy eyes (cataracts), tiredness.
How do vets diagnose diabetes?
Your vet finds high blood sugar and sugar in the urine. More bloodwork checks for related problems like pancreatitis or Cushing's.
How is diabetes treated?
Treatment means insulin injections twice a day, a consistent diet and regular glucose checks. Your vet adjusts the insulin over time.
How much does diabetes cost to treat?
Diagnosis (exam and tests): $200–$500; Ongoing treatment, per month: $40–$150; First-year total: $1,000–$3,000; Each year after that: $800–$2,500. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.