Diabetes in Dogs: Signs, Treatment, Daily Care and Monthly Cost

The core signs, according to Cornell and the AVMA:

• Drinking much more water than usual
• Peeing more, bigger puddles, more trips outside, or accidents in a house-trained dog
• Eating more, or acting hungry all the time
• Losing weight even though they are eating

The thirst and peeing happen because extra sugar in the blood spills into the urine and pulls water out with it. Other signs can include tiredness or weakness, a smaller appetite, cloudy eyes from cataracts, skin or bladder infections that keep coming back, a dull coat, and loss of muscle.

The AAHA notes that early signs can build so slowly that owners may not notice them. I know how true that is. My dog, Nucky, had diabetes, and I found out only shortly before he was put to sleep. He also had cancer and masses, so diabetes was one of several things wearing him down. I missed the signs in my own dog, and I wish I had done more to keep him comfortable. If your dog's drinking or peeing has changed, call your vet this week, even if everything else seems fine.

Dogs at higher risk. The AVMA says dogs are usually diagnosed between 4 and 14 years old, most often around 7 to 10, and females are affected about twice as often as males. Cornell names middle-aged females, Samoyeds, Miniature Schnauzers, Poodles, and dogs with a history of pancreatitis. The Merck Veterinary Manual adds Yorkshire Terriers, Border Terriers, Cavalier King Charles Spaniels, Bichon Frises and West Highland White Terriers, and stresses that any breed can get diabetes. A risk factor is a reason to pay attention. It is not a diagnosis.

For a picture of what normal drinking, energy and weight look like, see signs of a healthy dog.

The VCA calls DKA an emergency, and the AVMA tells owners to contact their vet immediately for the low blood sugar and DKA signs above. Signs of too much insulin and too little can look alike, which is one more reason never to guess by changing the dose.

1. Call your vet or the nearest emergency clinic immediately.
2. If your dog is awake and can swallow, the VCA says a small amount of glucose solution, honey or corn syrup may be offered. Cornell advises Karo syrup on the gums, then calling your vet right away.
3. If your dog cannot swallow properly, rub a small amount on the gums or under the tongue. Do not pour liquid into the back of the mouth; your dog could breathe it in.
4. Go in. A dog who is having a seizure, is unconscious or is badly affected needs emergency care. The VCA says severe low blood sugar needs glucose given through an IV.

Ask your vet now, before you ever need it, how much syrup is right for your dog; there is no one amount for every dog. Never use sugar-free syrup or a sugar substitute. Honey or syrup buys time on the way to the vet. It does not replace the vet.

Diagnosis is vet work. It rests on the signs plus high blood sugar that stays high and sugar in the urine. The AAHA says those two findings together establish the diagnosis. Your vet will take a history, examine your dog, run blood and urine tests, and look for other illnesses that make diabetes harder to control. Cornell notes that a fructosamine test can help tell stress from true diabetes when a dog has high blood sugar but no signs.

Before the visit, write down:

• When you first noticed the drinking, peeing, appetite or weight change
• Roughly how much water your dog drinks in a normal day, if you can measure it
• Every medicine, food and treat your dog gets
• Past health problems, and whether an unspayed female recently had a heat cycle

Keep your dog's water available the whole time. Taking water away to see what happens is not safe.

According to Cornell, insulin is the cornerstone of treatment and most diabetic dogs need it for life. It is usually injected under the skin twice a day at mealtimes, with the same amount of food at the same times. Your vet chooses the insulin and the dose. Cornell tells owners never to increase insulin without their vet's direction.

What counts as success surprises many owners. The AAHA's 2026 guidelines say "the primary goal of treating canine diabetes mellitus is to control clinical signs." A well-controlled dog drinks, pees and eats close to normal and holds or gains weight. Tight blood sugar numbers are rarely possible with twice-daily insulin, so one high reading does not mean the treatment has failed.

The daily routine usually looks like this:

1. Insulin exactly as prescribed. Ask the clinic team to show you how to give injections and how to store and handle the insulin.
2. The same food, the same amount, on schedule. Cornell says many dogs do well on a complete and balanced diet they enjoy; some do well on higher-fiber food. Change food only with your vet.
3. Steady activity. Keep walks and play about the same from day to day.
4. A daily log. Food eaten, water, appetite, peeing, weight and each insulin dose. One shared log also stops two people in the house from giving the same dose twice.
5. Monitoring your vet sets up. Blood glucose checks, a continuous glucose monitor, or urine glucose or ketone checks, only as your vet directs. The AAHA does not recommend human glucose meters for managing dogs, because they may not be calibrated for dogs.
6. Rechecks. Glucose curves and follow-up visits show how your dog is responding.

Get a plan in writing for the bad days: what to do if your dog skips a meal or eats only part of it, and what to do if you see low blood sugar signs. The AVMA says a normal appetite matters with insulin, because a dog who does not eat can end up with low blood sugar.

Other health problems can make diabetes harder to control, including obesity, pancreatitis, Cushing's disease, an underactive thyroid, infections, dental disease and steroid medicines, according to the AAHA. In unspayed females, hormones after a heat cycle can work against insulin, and your vet may talk with you about spaying. Older dogs may need closer monitoring.

There is no single national price. Cost depends on your dog's size and insulin needs, the insulin your vet chooses, how your dog is monitored, food, your clinic and region, and any complications. The early months, with extra rechecks and glucose curves, usually cost the most.

The PetMD figures and the CareCredit survey measure different things, so treat them as a rough guide, not a quote. CareCredit itself says real costs vary by location and provider.

When my dog, Nucky, was diagnosed, I was quoted about $200 a month for insulin. I learned later that insulin could be bought at a significant discount at Walmart. Because of his other conditions, treatment was not the right path for him, but I would have considered it on that basis.

If cost is what stands between your dog and treatment, say so to your vet. Ask whether a lower-cost option, including human-labelled insulin sold at pharmacies such as Walmart, is suitable for your dog. The type of insulin, the dose and the syringe all have to match, and that decision belongs to your vet.

Also ask the clinic for a written estimate that covers the diagnosis, the first weeks of adjusting the dose, supplies, rechecks, and what an emergency visit would cost. If you have pet insurance, check the policy terms; coverage for a new diagnosis depends on the policy and its pre-existing condition rules.

1. Waiting for weight loss or cataracts to confirm it. New thirst and peeing are enough reason to call.
2. Diagnosing at home. One reading or a set of symptoms is not a diagnosis; your vet needs blood and urine tests.
3. Taking away water. It does not help and can make your dog dehydrated.
4. Changing the insulin dose, timing, type or syringe on your own. Too much insulin can cause life-threatening low blood sugar.
5. Changing food, treats or activity without your vet. Consistency is part of the treatment.
6. Using human diabetes advice as a plan for your dog.
7. Treating honey or syrup as the cure for low blood sugar. It is first aid on the way to the vet.
8. Two people dosing without a shared log. Write every dose down.

Drinking more, peeing more, eating more and losing weight are the classic signs. Tiredness, cloudy eyes and repeat skin or bladder infections can also appear. The AVMA and Cornell say a vet should check these signs.

Many can. The AVMA says diabetic dogs can live long, comfortable lives with the right treatment and monitoring. It is a serious disease, and how an individual dog does depends on things like other illnesses and whether DKA develops.

With the signs plus blood sugar that stays high and sugar in the urine, according to the AAHA. Blood and urine tests also check for other illnesses that affect treatment.

Call your vet before giving insulin, and follow the plan they gave you for missed meals. A dog who gets insulin without eating can develop low blood sugar.

Weakness, tiredness, trembling, seizures and wobbly walking, according to the AVMA. Cornell adds poor appetite and confusion. Call your vet or an emergency clinic immediately.

A life-threatening emergency caused by too little working insulin. Signs include vomiting, not eating or drinking, fast or hard breathing, weakness and collapse. It needs emergency treatment.

PetMD estimated insulin alone at $30 to $150 a month in 2025, and one national cost study lists $79 a month for injectable-insulin diabetes care. Ask your clinic for a written estimate, and ask whether a lower-cost insulin is suitable for your dog.

No single food suits every dog. Cornell says higher-fiber diets help some dogs, many do well on a complete and balanced food they enjoy, and consistency matters most. Your vet should direct any change.

If your dog's drinking, peeing, appetite or weight has changed, call your vet and book a visit this week, and bring your notes. If you need a vet near you, start with the DogServ directory. And if your dog has already been diagnosed, ask your vet today for the missed-meal and low blood sugar plan in writing, and put it on the fridge next to your log.

• American Animal Hospital Association: AAHA's 2026 guidelines
• American Animal Hospital Association: AAHA
• American Animal Hospital Association: AAHA
• American Veterinary Medical Association: AVMA
• CareCredit: CareCredit
• Cornell University College of Veterinary Medicine: Cornell
• Merck Veterinary Manual: Merck Veterinary Manual
• PetMD: PetMD
• VCA Animal Hospitals: VCA
• VCA Animal Hospitals: VCA