Depending on the length of the trip, water bowls can be left in the carrier or not. Play with your pet or engage it in some kind of positive interaction before you leave home. If your pet is well exercised before it is confined, it will be more comfortable. Make sure your dog has a long walk or your cat has enough time to use the litter before its confinement. Your pet will be less likely to become nauseated or to soil itself during confinement if it is given every opportunity to void before departure.
Most pets become adjusted to travel with frequent travel opportunities.
They may feel more secure if they are confined to a sturdy and well-ventilated carrier. Cats and small or medium dogs may learn to travel in pet carriers designed for travel. Large dogs, for example, may be confined behind special gates that section off the back of a motor vehicle. Have your pet's general health evaluated by a veterinarian before you leave on a long trip. Ideally, this should be scheduled well before an anticipated trip and not left for the last minute.