Most travel with a Highlander begins in a car, and the breed's size and curiosity make a secure carrier essential. A roomy, well-ventilated hard-sided carrier large enough for a substantial cat to stand, turn, and lie down comfortably is the safest choice. The carrier should be secured with a seatbelt so it cannot shift or tumble during sudden stops, protecting both the cat and the people in the vehicle.
Highlanders are intelligent and people-oriented, which can cut both ways on the road. Some take readily to car travel, especially if introduced gradually and positively as kittens; others find it stressful. Acclimating a cat with short practice trips, familiar bedding, and calm reassurance pays off long before any major journey is required.
For longer drives, plan for the cat's basic needs without ever opening the carrier in a moving vehicle or in an unsecured space. Offer water during stops, keep the cabin at a comfortable temperature, and never leave a cat alone in a parked car, where temperatures can become dangerous with startling speed. A familiar-smelling blanket and a covered carrier can help an anxious cat settle.
A large, strong cat like the Highlander can be surprisingly determined, so double-check that carrier latches are secure and consider a harness only as a backup for transfers, never as a substitute for the carrier while driving. The goal throughout is a contained, calm, and predictable experience.