For a dog with stiff hips, a car ride often goes wrong before the engine starts. Jumping up into a boot asks her hips to launch her whole weight, and jumping down lands that weight through joints that no longer absorb impact well. Fix the entry and the exit, give her a surface she can trust once she is inside, and pace the journey around her body rather than around your schedule, and an elderly dog can travel contentedly again.
Practise the Ramp or Step Long Before a Real Journey
Introduce a wide ramp or a sturdy step in the garden or hallway, on a level surface, with treats placed along it and no car journey attached to the session. Let her walk up and down at her own pace across several short practices until the equipment bores her, because boredom is exactly what you want on travel day. Set the ramp at as shallow an angle as the car allows, brace it so it cannot shift or flex under her, and cover its surface with a grippy material her paws can hold. Stand beside her hindquarters as she climbs so she feels supported without being lifted, and help her down the same way at the far end, since descending is where an unsteady dog can pitch forward onto sore joints.
Build Her a Boot or Hatch Space That Protects Her Hips
Clear the boot or hatch area completely, lay a non-slip base that cannot bunch or slide under braking, and add supportive bedding with enough padding to cushion her hip bones against the floor without being so soft that she sinks and struggles to rise. She needs room to lie fully stretched, to curl, and to change sides during the journey, because holding one position for a long stretch is what leaves an arthritic dog stiff and sore on arrival. Position her away from luggage that could shift, keep ventilation reaching her on warm days, and avoid feeding a full meal shortly before departure so she travels on a settled stomach. A familiar blanket from her bed at home makes the space smell like rest rather than like an outing to fear.
Pace Long Drives Around Stops, Not the Destination
Treat arrival as part of the ride rather than the end of it. Park on the level where you can, set the ramp before opening her door, and give her a moment to gather herself before she walks down, because a dog stiff from travelling needs her first steps to be slow ones. Offer water, a toilet chance and a short, flat wander before she settles indoors, and notice how she moves an hour later as well as immediately, since stiffness that lingers tells you more about the journey's cost than her excitement at homecoming does.
Plan the route with regular breaks rather than one long haul, and at each stop give her time: time to be helped out slowly, time to relieve herself, time to drink, and time for a few unhurried paces on flat ground so her hips loosen before she climbs back in. Watch how she moves after each leg of the journey; a dog who arrives stiff but loosens within minutes is coping, while a dog who stays sore into the next day is telling you the trips need to be shorter or the setup needs rethinking with her vet. Keep a short note of journey lengths and how she was afterwards, and file that note with her other records in KinsLe, where Pet Passport brings her vet contacts and comfort history together for whoever drives her next.