Diabetic pet emergencies: when to call the vet urgently
The situations where a diabetic dog or cat needs urgent veterinary attention — low blood sugar, ketoacidosis, collapse, vomiting and refusing food.
Diabetic pet emergencies: when to call the vet urgently
Important
Mello cannot assess your pet in an emergency. If your pet is collapsed, seizing, severely weak, repeatedly vomiting, refusing food, or you suspect low blood sugar or diabetic ketoacidosis, contact your vet or emergency vet immediately.
This page is a scannable reference, not a substitute for veterinary care. Save your regular vet's number and your nearest out-of-hours number in your phone now, before they are needed.
Low blood sugar
Signs can include sudden weakness, wobbliness, trembling, disorientation, unusual sleepiness, collapse or seizures, often after insulin. If your pet is conscious, rub honey or glucose syrup on the gums and contact your vet immediately. If unconscious or seizing, do not put anything in the mouth — go straight to the vet.
Read the full hypoglycaemia guide.
Diabetic ketoacidosis
Vomiting, refusing food, marked lethargy or weakness, dehydration, unusual breathing and sometimes a sweet, acetone-like smell on the breath can indicate DKA. It is a medical emergency and cannot be managed safely at home.
Contact your vet or an emergency clinic immediately.
Collapse or seizure
Collapse or a seizure is always urgent. Keep your pet safe from falls, do not put anything in their mouth, and contact an emergency vet immediately. If low blood sugar is suspected and your pet is conscious, follow the hypoglycaemia guidance while you make the call.
Repeated vomiting
Repeated vomiting can accompany DKA, severe illness or another emergency. Do not wait for it to pass or try to manage it from an article. Call your vet or emergency clinic immediately.
See what to do when your diabetic pet will not eat for the related safety guidance.
Refusing food
A diabetic pet that refuses food needs careful handling because insulin without food can be dangerous. Contact your vet before giving insulin, especially if refusal continues or your pet seems unwell. Read Diabetic dog or cat won't eat.
A missed or uncertain dose
Do not give a second dose to compensate for an injection that was missed or may not have gone in. Too much insulin is more dangerous than too little. Note what happened and when, carry on with the next scheduled dose as normal, and contact your vet if unsure. Read the full missed or uncertain insulin dose guide.
Keep your emergency numbers ready
Save your vet, the nearest emergency practice and any relevant pet insurance or transport details in your phone today. Tell another person in your household where the emergency supplies are kept and what symptoms mean you should call.
For newly diagnosed owners, the Just Diagnosed guide helps you build a routine before an emergency happens.
Quick answers
When should I call the vet urgently?
Contact your vet or an emergency clinic immediately if your diabetic pet collapses, has a seizure, is repeatedly vomiting, refuses food, becomes very weak or disorientated, or shows signs of low blood sugar.
What are the signs of diabetic ketoacidosis?
Vomiting, refusing food, marked lethargy or weakness, dehydration, unusual breathing and sometimes a sweet, acetone-like smell on the breath can be signs of DKA. It is a medical emergency.
What should I do in a low blood sugar emergency?
If your pet is conscious, rub honey or glucose syrup on the gums and contact your vet immediately. If unconscious or seizing, do not put anything in the mouth and go straight to the vet.
This guide is for educational purposes and is not a substitute for professional veterinary advice.
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Sources
This guide is based on general veterinary diabetes emergency guidance and should be discussed with your own veterinary team.
Editorial policy: Mello's guides are reviewed for clarity and safety, but do not replace a veterinary examination or individual treatment plan.
Read about missed insulin doses · Read about refusing food · Read about hypoglycaemia
When to contact your vet
- Contact your vet promptly if your pet’s symptoms, appetite, drinking, urination, behaviour or glucose readings change unexpectedly.
- Ask your vet for advice before changing insulin, food, exercise or any other part of your pet’s routine.
- Seek urgent veterinary care for collapse, seizures, severe weakness, repeated vomiting, or suspected hypoglycaemia or diabetic ketoacidosis.
Quick answers
What's Next?
Continue your diabetes management journey with these recommended next steps.
You might find this useful too
Missed or uncertain insulin dose in dogs and cats: what to do
Missed your pet's insulin, or unsure whether the full dose went in? What to do next, what not to do, and exactly what your vet will need to know.
Your diabetic dog or cat won't eat: what to do next
A diabetic pet refusing food needs careful handling, because insulin without food can be dangerous. What to do, what to note, and when it's urgent.
Hypoglycaemia (low blood sugar): the emergency every owner should know
Low blood sugar is the most urgent risk for a diabetic pet. Learn the warning signs, exactly what to do, and how to prevent it.
Keep your care organised
Mello is being built for calm, consistent tracking before the app launches.
Mello is a tracking and communication tool, not a substitute for veterinary advice. Always consult your vet for medical decisions about your pet.
Learn how we research and maintain health content in our editorial policy.