Legal Requirements: How Dogs Must Travel in Cars
In the UK, Highway Code Rule 57 requires that dogs be suitably restrained in vehicles. Accepted methods include:
- Crash-tested crate or carrier secured to the boot or rear seat: the safest option in an accident.
- Crash-tested safety harness clipped directly to the seatbelt buckle or Isofix anchor. Not all harnesses on the market have genuine crash-test certification — check for independent testing (e.g. Centre for Pet Safety ratings).
- Dog guard or boot partition: separates the boot from the passenger area in estate cars and SUVs.
An unrestrained 30 kg dog in a 48 km/h (30 mph) collision generates approximately 1,350 kg of force. Beyond safety, travelling with an unrestrained dog can invalidate your motor insurance.
Summer's Biggest Danger: Heatstroke in a Parked Car
On a 22°C day, the temperature inside a parked car can reach 47°C within an hour — even with windows cracked. Dogs regulate body temperature almost exclusively by panting; this mechanism fails rapidly at extreme temperatures. Heatstroke is a veterinary emergency that can cause organ failure and death within minutes.
Golden rule: if you cannot take your dog with you when you leave the car, do not bring them on that errand. "Just five minutes" is not safe. A cracked window does not make a car safe in summer.
Recognising Heatstroke
- Heavy panting, excessive drooling.
- Bright red or purple gums and tongue.
- Wobbling, weakness, loss of coordination.
- Vomiting, diarrhoea.
- Collapse or loss of consciousness.
Immediate action: get the dog out of the car into shade, wet the coat with cool (not ice cold) water — especially neck, armpits and groin — and get to an emergency vet immediately. Do not wrap in wet towels (traps heat).
Tips for Long Summer Journeys
- Stop every 90 minutes in summer — choose shaded rest areas with grass, not tarmac.
- Travel in the early morning or evening to avoid peak heat.
- Fresh water always available: a portable travel bowl and plenty of water are essential.
- Last meal 2–3 hours before departure — helps prevent car sickness without leaving the dog hungry.
- Air conditioning at 22–24°C — do not direct vents straight at the dog.
- Familiar items: a favourite blanket or toy reduces anxiety.
- Up-to-date parasite prevention — summer and new environments increase tick and flea risk significantly.
What to Pack
- Vaccination record and pet passport (required for EU travel post-Brexit).
- Water and a portable bowl.
- Poo bags.
- Spare lead and collar with an up-to-date ID tag.
- Basic first-aid kit: gauze, saline, tick removal tool.
- Contact number for a vet at your destination.
Store your dog's vaccination record, microchip number and health history in Purzi — everything you need is in your phone, whether at a border crossing or a roadside emergency.