Car Sickness in Dogs: Why It Happens and How to Prevent It
Many dog owners discover their pet has travel sickness the hard way — usually somewhere on a motorway with a car full of luggage and nowhere suitable to pull over. Car sickness in dogs is far more common than most people realise, and understanding why it happens is the first step towards making journeys genuinely manageable for your animal.
The Science Behind Canine Motion Sickness
Motion sickness occurs when the brain receives conflicting sensory information. The inner ear, which governs balance and spatial orientation, detects movement. The eyes, if fixed on a stationary interior, report no movement at all. This mismatch triggers nausea in the same way it does in humans on a boat or in the back seat of a winding country road.
In dogs, there is an additional layer of complexity. The vestibular system — the balance apparatus housed in the inner ear — is not fully mature in puppies. This is why young dogs tend to suffer from travel sickness more acutely than adult dogs, and why many dogs outgrow the problem as their neurological systems develop. However, some dogs carry sensitivity into adulthood, particularly if early car experiences were negative or associated with veterinary visits.
Recognising the Signs
Dogs cannot tell you they feel unwell, but they communicate it clearly enough once you know what to look for. The most common indicators of motion sickness include:
- Excessive drooling or yawning
- Lip licking and swallowing repeatedly
- Whining, restlessness, or pacing
- Lethargy or reluctance to move
- Vomiting
Some dogs display what looks like anxiety rather than physical nausea — trembling, panting, or attempting to hide. In these cases, the travel sickness may have evolved into a conditioned fear response, where the car itself has become an anxiety trigger associated with feeling unwell.
Practical Adjustments That Make a Real Difference
Positioning in the Vehicle
Dogs travel better when they can see out of the window, as visual input that matches the movement the inner ear detects reduces sensory conflict. A booster seat or a secured position in the middle of the back seat, elevated enough to see the road ahead, can make a measurable difference. Dogs confined to the boot with no visual reference often fare worse.
Keeping the car well-ventilated is also important. Fresh, cool air reduces nausea in both animals and humans. A partially open window — safely secured so your dog cannot lean out — allows airflow without the risk of debris at speed.
Adjusting Food Timing
Travel on an empty or near-empty stomach. Withhold food for two to four hours before a journey. A full stomach is more likely to respond to movement with nausea, whilst a completely empty stomach can occasionally cause its own discomfort. A very small, easily digestible snack an hour or two before travel strikes the right balance for many dogs.
Gradual Desensitisation
For dogs whose sickness has a behavioural component — those who show anxiety before the journey even starts — systematic desensitisation is the most effective long-term approach. Begin by simply sitting with your dog in a stationary car, rewarding calm behaviour with treats and praise. Progress to short journeys of a few minutes that end somewhere positive — a park, a favourite walk. Over several weeks, gradually extend the duration.
The goal is to rebuild the car as a neutral or positive environment rather than one associated exclusively with feeling ill or visiting the vet.
Natural Remedies Worth Considering
Ginger has a reasonable evidence base as an antiemetic in humans and is used in veterinary contexts with some success. Small amounts of ginger — around 25mg per kilogram of body weight — can be given in biscuit form or as a supplement an hour before travel. Always choose products formulated for dogs, as human preparations may contain xylitol or other harmful additives.
Lavender has a calming effect in some dogs when used aromatically. A small amount on a bandana worn loosely around the neck, or diffused briefly in the car before your dog enters, may reduce anxiety-driven sickness. The evidence is largely anecdotal in dogs, but the intervention is low-risk and worth trialling.
When to Speak to Your Vet
If home strategies are not providing enough relief, your vet can prescribe licensed antiemetics for dogs. Maropitant citrate, sold under the brand name Cerenia, is specifically licensed for the prevention of motion sickness in dogs and works by blocking the signals in the brain that trigger vomiting. It is given as a tablet one to two hours before travel and is considered safe for most dogs.
For dogs with severe anxiety alongside physical sickness, short-acting anxiolytics may be recommended in addition to or instead of antiemetics. Your vet will assess the degree of distress and recommend an appropriate protocol based on your dog's individual health profile and travel frequency.
Building Towards Comfortable Travel
Most dogs can be helped significantly with the right combination of practical adjustments, behavioural work, and — where necessary — veterinary support. The mistake many owners make is accepting motion sickness as an unchangeable fact and limiting travel as a result. With patience and the right approach, the majority of dogs who struggle with car journeys can learn to tolerate them, and many go on to genuinely enjoy them.
Start small, stay consistent, and treat every positive journey as progress worth building on. The end goal — a dog who settles calmly in the car — is achievable for most animals given time and the right support.