Guide
Starting out with a diabetic dog
From the diagnosis to a settled routine: what the tests mean, what to ask before you go home, how insulin and supplies work, and what the first weeks really look like.
Sunny, owner“I wish my dog lived as long as I do.”Updated
I'm an owner, not a vet. This is not veterinary advice, so check anything medical with your own vet.
Key facts
- Only your vet can confirm diabetes, from your dog, his history and blood and urine tests. One home reading isn't enough.
- You probably didn't cause it. Most causes aren't things an owner could have prevented.
- Most diabetic dogs need insulin for life, and food changes or supplements can't replace it.
- The insulin, the syringe or pen and the amount all come from your vet's written plan. Never swap insulin or devices without your vet's okay.
- Getting a dog regulated takes time and several check-ups. There's no deadline you've missed.
- If your dog is weak, wobbly, trembling, vomiting or not eating, call your vet or an emergency clinic now.
I never give insulin amounts here. Yours comes from your vet's written plan.
When your dog is first diagnosed with diabetes
Hearing that your dog has diabetes can be a shock, and it's a lot to take in. Diabetes means your dog's body can't use the sugar from food properly. Dogs get it when the body stops making enough insulin, the hormone that lets the body use that sugar, or when something makes insulin work less well. Insulin injections are usually part of the treatment your vet prescribes.
Drinking more, peeing more, being always hungry or losing weight can all be signs. With Cooper, it was the drinking and peeing I noticed first. Signs alone don't confirm anything, though. If you're still wondering does this mean my dog has diabetes, only the vet can tell you.
It's very common to feel guilty and go over every meal and treat. If you're asking why did my dog get diabetes, did I cause it, you most likely didn't. Pancreas problems, hormones, other illnesses and some medicines can all play a part, and the exact cause for one dog often isn't known. That's normal. If guilt is weighing on you, tell your vet. They can point you to support as well as medical answers.
You may also wonder whether some breeds are more likely to get diabetes. Some breeds get it more often, but any dog can get it, and being on a list doesn't mean the food, the breeder or you caused it. His signs, his history and his test results matter far more than any breed list. Don't brush off extra drinking and peeing because his breed is meant to be low risk.
Tests that confirm diabetes and what the results mean
Waiting for results is hard. Your vet diagnoses diabetes from your dog, his history, and blood and urine tests, so one home reading isn't enough. Glucose is the sugar in the blood, and sugar in the urine is another clue. The vet may also check blood chemistry, a urine sample and a blood test that shows the average over the last few weeks. Our page on what tests confirm diabetes and what the results mean explains what to ask.
Other tests may look for illnesses that often come with diabetes. Ask which results confirm the diabetes and which are looking for other problems, and keep copies of results with the laboratory ranges. A result marked high or low needs your vet to explain what it means for your dog.
Having two conditions both called diabetes is confusing. Diabetes insipidus is a problem with how the body handles water, not blood sugar. It can also make a dog very thirsty and pass lots of watery urine, but so can plenty of other illnesses. Ask the vet to write down the full name of the condition your dog has, so nobody gives the wrong medicine by mistake. Never limit his water or try a water-deprivation test at home.
If your dog is vomiting, weak or refusing food while you wait, call your vet now. Don't wait for the results appointment.
If your dog is weak, wobbly, trembling, vomiting or not eating, call your vet or an emergency clinic now. Don't wait for a reading or the next check-up.
How long diabetic dogs live, remission and alternatives to insulin
Not knowing what's ahead is hard, and it's natural to want a number. But how long a diabetic dog lives isn't decided by diabetes on its own. Many diabetic dogs do well with daily care, and a lot depends on his general health, any other illness and how he responds to treatment. I'd start by asking your vet what can get better now, what needs watching, and what would change the picture. Another dog's story won't predict how yours will do.
You might hope he'll one day come off insulin. On whether a diabetic dog can go into remission: most diabetic dogs need insulin for life, and remission is more common in cats than dogs. Now and then, treating another problem changes things, and only your vet can judge that. A better appetite or a lower reading doesn't mean you can stop insulin, because the insulin may be the reason he's doing better. If readings drop or he seems weak, call your vet right away.
When you're exhausted, a natural cure sounds very tempting. But if you're wondering whether diabetes can be managed without insulin, with pills, diet or natural remedies, food changes and supplements can't replace insulin for a diabetic dog, and remedies made for people or cats may not work for dogs. Show any label to your vet before you use it, and never stop insulin to test a product.
If the routine feels impossible, tell your vet honestly. They can show you the injection again, help train someone else in the family, or make the routine easier to manage.
Bringing your dog home from hospital
Some dogs stay in the clinic for a while after diagnosis. If your dog is in hospital after diagnosis, bringing him home can feel like relief and fear at the same time. Before he leaves, ask for a written home plan and for someone to show you the routine with your own supplies.
The plan should say what to do if he won't eat, starts vomiting or you're not sure he got his injection, and who to call at night. Ask for the discharge summary, the medicine list, the food instructions and any monitoring the vet wants. Try to have everyone who'll look after him there to hear it.
Ask what should get better at home and what can't wait until the next check-up, and book that check-up before you leave. If he won't eat or seems unwell once he's home, call the vet quickly. Don't try to copy what the hospital did yourself.
Before the first evening at home: injections and the written plan
Injecting may seem scary at first, but most owners get the hang of it quickly. Ask the vet team to show you how, then do it in front of them so they can correct you. Our page on how to make insulin time easier for your dog has more on settling into it.
Ask how to store the insulin and the syringes or pen, because different products are handled differently. See how insulin should be kept at home for the basics.
Before you leave the clinic, make sure you have a written plan: meal times, injection times, any home testing, phone numbers, and what to do if a meal or an injection doesn't go to plan. The insulin amount comes only from that plan. Copy it by hand onto a blank insulin schedule and keep it where everyone who looks after him can find it. If anything is missing or unclear, ring the clinic and ask them to explain it simply.
Insulin types, syringes and insulin pens
There are a lot of insulin names. The insulins used for dogs mainly differ in how they're made, how you handle them and how long they work. Some are suspensions, which are handled differently, so follow the instructions for yours. There's no single best insulin for every dog. Your vet picks one and checks how he does on it, so ask why they chose it and how they'll check it's working.
The syringe has to match the strength of the insulin. Check the vial and the syringe show the same U number every time: insulin is U-40 or U-100, and the syringe must say the same. Syringe boxes can look confusingly alike, so when you're working out which syringes and needle size to buy, buy only what your vet or pharmacist says is right, ask for the exact product name in writing, and take the insulin box with you when you shop.
If you think the wrong syringe has already been used, call a vet urgently and have the boxes with you. Don't try to fix it yourself.
If the syringe feels fiddly or scary, you may wonder whether insulin pens are an option for dogs. Pens are made for some insulins but not all, so a pen isn't always a straight swap. If your eyesight, grip or nerves make the syringe hard, tell your vet. If you do switch, have the clinic show you that exact pen, watch you use it, and tell you what to do if you're ever not sure the dose went in.
Getting a reliable insulin supply
Knowing you won't run out takes a lot of worry off. Start with your vet: ask for the exact product, the matching pen or syringes, a reliable place to get them, and the backup plan if something goes out of stock. Order early, so a late delivery doesn't leave you without insulin.
It's tempting to buy insulin from the chemist when you're running low, but human or pharmacy insulin can't simply replace your dog's prescription. A familiar name isn't a good reason to switch, and a different insulin won't follow your old plan. Check the box before you leave the shop. If something doesn't match, ask your vet to sort it out before you inject. If the wrong insulin may already have been given, call the vet straight away and keep the box.
If you order supplies online, check how to confirm a safe source for prescribed supplies first. Make sure it's the exact product your vet prescribed, that it stays properly stored on the way, and that the syringes match it. If a seller never asks for a prescription, treat that as a warning sign. If what arrives has a different label, don't guess. Ask the pharmacy or your vet before you use it.
If your insulin is recalled or out of stock, call your vet or pharmacy as soon as there's a problem. You can't just swap in a different insulin off the shelf. Tell them how much you have left and when the next injection is due, and keep the box and batch number so they can check any recall. If you might miss an injection and the clinic is closed, call their out-of-hours number.
The first weeks: getting your dog regulated
Getting a dog regulated takes time, and there's no deadline you've missed. Your vet looks at appetite, thirst, weight and glucose readings over several check-ups, and some dogs take longer than others. It's common to see things get better and then have another rough week. One day doesn't tell you how it's going overall.
It's also common for the routine to change in the first few weeks while your vet sees how your dog responds. Ask when the next visit is, what to write down until then and who to call in between. Our page on how often a diabetic dog needs vet check-ups covers what to expect. Take the questions for the vet sheet so nothing gets forgotten.
At home, keep one shared notebook. A good note is three lines: what he ate, how he seemed and what time he had his insulin. See what to write in a notebook for your diabetic dog, or use the seven-day log. It doesn't need to be neat.
If your vet wants you to test at home, ask them to show you how to check your dog's glucose at home, which meter to use and what to do if a reading worries you. A glucose curve is a set of readings taken across a day. Home curves can help, but only if testing suits your dog and you. If it upsets him or you're struggling with the meter, tell your vet. Write readings down as a record, but don't change anything because of them unless your vet has told you to.
When glucose stays high or the numbers swing
It's worrying when glucose stays high even on insulin, but this is common and your vet can help find out why. Storage, the injection itself, food, an infection or another illness can all play a part. The vet may first check your supplies and watch you do the routine. That's to find the cause, and nobody is judging your care. Never give extra insulin on your own, and if you're not sure an injection went in, don't give another one to be safe. Call the vet instead.
Numbers that swing from day to day are common too. Readings often change even when nothing seems different. Meals, exercise, how the insulin is handled, how the blood sample is taken and other illness can all affect them. A big swing doesn't tell you what to do with the insulin. Don't change lots of things at once to smooth out the graph. Your dog being comfortable and avoiding lows matters more than a neat graph.
You may read about the Somogyi rebound and wonder if it explains his high numbers. It means the sugar swings high after it has dropped too low. One high reading can't tell you he had a rebound, and it can't tell you to give more or less insulin. A curve can miss things, especially overnight, which is why your vet needs all the readings and how he's been before deciding anything.
Bring your readings with times and the meter used, plus notes on meals, thirst, weight and energy. Tell your vet quickly about any low readings or illness. If he is weak, trembling, wobbly or confused, this is an emergency: get urgent help now rather than waiting for another day of readings.
Switching insulin types
If you are switching insulin types, start by getting the new plan in writing and don't try to work out the swap at home. Different insulins can work differently, and the syringe or pen may be different too.
Ask which syringes or pen go with the new insulin, how to store it and when they want readings, and ask the vet to watch you use the new supplies once. Keep the old and new boxes apart so nobody grabs the wrong one. What you did with the old insulin is useful history, but it doesn't carry over to the new one.
Book the first check-up before you leave. If your dog turns weak, wobbly, unusually sleepy or has a seizure, call your vet or an emergency clinic now.
Puppies, unspayed females and adopted diabetic dogs
It's a shock when a puppy or young dog has diabetes, but his care just needs a plan made for him. Diabetes is more common in adult dogs, so your vet will look at his growth, appetite and why it started young. Don't copy an adult dog's routine or assume he'll grow out of it. Ask whether seeing a specialist would help, and how his food and checks will change as he grows. If a puppy is weak, vomiting or refusing food, call the vet the same day.
If your female dog isn't spayed, you may be wondering whether a diabetic female dog should be spayed. Hormones from her heat cycle can make insulin work less well, so most vets will want to talk about it. Your vet decides the timing based on her health. Tell them when her last heat was and whether she could be pregnant, ask who will tell you about food and insulin around the operation, and don't change her treatment yourself as the date gets close.
Taking on a diabetic dog is a big, kind step. Before adopting or fostering a diabetic dog, ask for his vet records, his current written plan and a hands-on lesson in his daily care. Find out what food he actually eats and who has been giving his injections, and stick to his current routine. Agree who does the daily care, where supplies come from and who helps if you can't, then book his first check-up.
When to stop reading and call your vet
If your dog collapses, has a seizure, won't respond or is struggling to breathe, go to an emergency vet now. Ring ahead if you can. Don't wait to take a reading, ask an AI or check a list of symptoms. Open the emergency page if you need it.
Call your vet straight away if your dog won't eat, is vomiting, weak, wobbly, trembling or just not right, and tell them whether the injection was already given. Our page on when a diabetic dog needs a vet the same day lists the signs, and the guide when the day goes wrong walks you through it.
Before a bad day comes, ask your vet to write down what to do if your dog won't eat, if an injection is late, or if you're not sure it went in. Save the emergency clinic number on your phone now, so it's there when you need it.
My dog was just diagnosed with diabetes. Where do I start?
Getting the diagnosis can leave you feeling like there's too much to learn at once. Before you leave that first appointment, ask for the food and treatment plan in writing. Ask the team to show you how to use your own supplies, and get a number to call when something goes wrong. Ask what to do if your dog won't eat or you're not sure an injection went in.
At home, keep one shared notebook and decide who does each job. Start with the basics: meals, mood and injection times. You don't need to learn every complication in the first week. Book the next check-up and tell the vet honestly which parts you're finding hard. It usually gets easier once the routine settles, and most diabetic dogs go on to live happy lives.
Does it get easier? What does the first month look like?
Most of the first month goes on learning the equipment, noticing changes in appetite and asking the vet to explain things again. Some of it gets familiar quickly, though getting the sugar settled doesn't follow a fixed calendar.
Agree when the next check is, how to send questions, and which signs mean you call sooner. Keep your notes simple and honest. If the routine isn't working for your household, tell the vet early so the plan fits your real days. For most people it gets easier as the weeks go on.
Sources
- What insulin amount should I give my diabetic dog?Why the amount comes from your vet
- Notes and curves to show your vetWhat to write down for your vet
- Daily routine for a diabetic dog: meals, insulin and walksHow the daily routine fits together
- My dog is in hospital after diagnosis. What happens next?What happens after the hospital stay
- Emergency or low blood sugar: call your vet nowWhat to do if he is weak or not eating
Every outside source I used is listed on the Sources page.
Related
Guide
Daily routine for a diabetic dog: meals, insulin and walks
Planning meals and injections around your vet's routine.
Guide
Feeding a diabetic dog: food and routine
Choosing and changing food, and why the amount comes from your vet.
Guide
Home testing, glucose curves and notes for your vet
What to write down each day, and when your vet might ask for a curve.
Guide
When the day goes wrong: urgent help
The signs that mean you should call your vet straight away.
Printable
Blank insulin schedule
The amount lines are left empty. Copy this from your vet's plan.
Printable
Questions for the vet
Write your questions down before the visit so you don't forget them.
All pages on this topic
What the diagnosis means, getting a written plan from your vet, and getting ready for the first check-up.
- We are switching insulin types. What should we expect?Get the new plan in writing before the first injection of the new insulin.
- Glucose stays high even on insulin. Why?High readings on insulin are common, and your vet can help find out why.
- My puppy or young dog has diabetes. Is that different?Yes, a young dog needs a plan made for his age and growth.
- Can a diabetic dog go into remission or come off insulin?Most diabetic dogs need insulin for life, and remission is rare in dogs.
- Can diabetes be managed without insulin, with pills, diet or natural remedies?No. Food changes and supplements can't replace insulin for a diabetic dog.
- How long does it take to get a dog regulated?It often takes several weeks or more, and there's no deadline you've missed.
- What is diabetes insipidus and how is it different?Despite the name, diabetes insipidus is a problem with how the body handles water, not blood sugar.
- Our insulin is recalled or out of stock. What now?Call your vet or pharmacy as soon as you hear there's a problem with your dog's insulin.
- What tests confirm diabetes, and what do the results mean?Your vet confirms diabetes with blood and urine tests, and one home reading isn't enough.
- How long do diabetic dogs live? What is the outlook?Diabetes on its own doesn't tell you how long your dog will live, and many diabetic dogs do well.
- Which insulins are used for dogs, and how do they differ?Insulins mainly differ in how they're made, how you handle them and how long they work.
- Which syringes and needle size should I buy?Syringe boxes can look confusingly alike, so buy only the syringe and needle your vet or pharmacist says is right for your dog's insulin.
- What should I know before adopting or fostering a diabetic dog?Taking on a diabetic dog is a big, kind step, and it goes much better with the right information up front.
- Can a dog use human or pharmacy insulin?Not every insulin on the chemist's shelf can replace your dog's prescription.
- My dog is in hospital after diagnosis. What happens next?Before he comes home, ask for a written home plan and for someone to show you the routine.
- Why do my dog's numbers swing so much from day to day?Readings often change from day to day, even when nothing seems different.
- Are insulin pens an option for dogs?Pens work with some insulins but not all, so ask your vet before you switch from a syringe.
- Why did my dog get diabetes? Did I cause it?You probably didn't cause your dog's diabetes, and most causes aren't things an owner could have stopped.
- How do I confirm a safe source for prescribed supplies?Ordering your dog's supplies online can feel risky, so it's sensible to check before you buy.
- What is the Somogyi rebound, and could my dog have it?One high reading can't tell you that your dog had a rebound after a low.
- Are some breeds more likely to get diabetes?Some breeds get diabetes more often, but any dog can get it.
- Should my diabetic female dog be spayed?Hormones in an unspayed female can make insulin work less well, so ask your vet about spaying.