My puppy has had a seizure — what to do
A puppy who has had a seizure needs to see a vet as soon as possible, even if the episode is already over and they seem back to normal. Ring your vet now, or an out-of-hours emergency service if they are closed, and tell them what you saw — everything below is for while you get there, not instead of that call.
Emergency — ring a vet now
This is a sign that needs a vet straight away, not later today. Ring your practice, or an out-of-hours service if they are closed, and describe what you are seeing.
Do this now
Stay calm and try to keep track of how long the seizure lasts, using a phone timer if you can. Move anything nearby that your puppy could injure themselves on, such as furniture edges or stairs, rather than trying to hold or restrain them during the seizure itself.
Do not put your hands near your puppy's mouth. Contrary to old advice, dogs do not swallow their tongues, and you risk being bitten without meaning to. Dim harsh lights and keep the room quiet if you can, since sound and light can prolong or worsen a seizure in some dogs.
Once the seizure has stopped, keep your puppy warm, quiet and somewhere safe while you ring your vet, and do not offer food or water until they are fully alert and steady, given the risk of choking while they are still recovering.
What to tell the vet
Say how long the seizure lasted, whether this is the first one you've seen, and describe what actually happened — shaking, paddling, loss of consciousness, any noises, and how your puppy behaved immediately afterwards. A short phone video, taken safely, is genuinely useful if you can manage it without delaying getting help.
Mention your puppy's age, breed, and anything they may have had access to recently, including household chemicals, human medication, certain plants or foods that are toxic to dogs. Also mention any recent vaccinations, worming or flea treatments, and any other symptoms such as vomiting, unusual tiredness or a change in appetite.
What puppy seizures can mean
A seizure in a very young dog is more often linked to something identifiable than it typically is in an older dog, which is part of why prompt investigation matters so much. Low blood sugar, particularly in small or toy breed puppies who have missed a meal, is a genuine and treatable cause, as is exposure to a toxin, an infection, or a congenital condition affecting the brain or liver.
Idiopathic epilepsy, where no specific cause is found, is usually diagnosed in dogs between about one and five years old rather than in very young puppies, so a seizure at this age is generally taken as a sign to look for an underlying cause rather than assumed to be this kind of epilepsy from the outset.
Whatever the cause turns out to be, a seizure is a sign that something needs investigating rather than a diagnosis in itself, and your vet is the only person who can work out which of these possibilities applies to your puppy. Breed can be a small factor too, since certain breeds are more prone to particular inherited conditions, and it is worth mentioning your puppy's breed and any known family history when you speak to your vet.
Afterwards
Expect your vet to want a full examination and, depending on what they find, some blood tests to check things like blood sugar and organ function. Further investigation may be recommended depending on the results and how your puppy is doing.
Keep a written record of anything else you notice over the following days, including any further episodes, and follow whatever monitoring or treatment plan your vet sets out. A single seizure that is fully investigated and explained is a very different situation from repeated, unexplained episodes, so getting that first proper assessment matters.
Common questions
- My puppy seems completely fine now — do they still need a vet?
- Yes. Looking normal again does not tell you what caused the seizure, and several possible causes need prompt attention even once the episode itself has passed. Ring your vet and describe what happened rather than waiting to see if it happens again.
- Can low blood sugar cause a seizure in a puppy?
- Yes, this is a genuine and treatable cause, particularly in small or toy breed puppies who have gone a while without eating. It is one of several possibilities your vet will consider, which is part of why a full examination matters rather than guessing at home.
- Should I give my puppy food or water after a seizure?
- Not until they are fully alert and steady on their feet, because of the risk of choking while they are still recovering. Speak to your vet about when it is safe to offer food again.
- Is one seizure in a puppy always a sign of epilepsy?
- No. Epilepsy without an identifiable cause is usually diagnosed in dogs older than a puppy, so a seizure at this age is more often linked to something else, such as low blood sugar, a toxin, or an underlying condition, which is exactly why proper investigation matters.
- How can I help the vet understand what happened?
- Time the seizure if you can, note exactly what you saw, and take a short phone video if it is safe to do so. Mention anything your puppy may have eaten or been exposed to, and any other symptoms, since these details genuinely help guide what tests are needed.
- What should I do if my puppy has a second seizure?
- Ring your vet again straight away, even if you have already been seen once, and mention how long it has been since the first episode. Repeated seizures in a short space of time, or one that does not stop on its own, need urgent attention rather than a routine appointment.
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Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.