Carriers are designed to help you safely transport your dog. They come in a variety of sizes, weights and materials, and the kind you choose will depend on the size of your dog, his personality and how he will be traveling.

The simplest carriers are made of cardboard. Other carriers are made of hard plastic, nylon and wire. The size, weight and personality of your dog usually determine the kind of material you look for in a carrier. Cardboard and soft-sided nylon pet carriers are fine for toy and very small dogs, while larger dogs require a carrier with sturdier construction. PETCO carries a wide variety of carriers.

• Carriers made of two parts, a top half and a bottom half with a gate, are easy to assemble and store.
• Carriers with handles or handholds make it easier to move your dog safely.
• A door that locks or latches firmly is essential.
• Carriers should be well ventilated, with plenty of openings.

To prevent injury, carriers should contain nothing sharp or anything that could come loose.

For long car trips, choose a carrier with plenty of ventilation and enough room for your dog to stand, sit and lay down. Carriers are essential on road trips, no matter how long or short the journey, because they help keep your dog safe and secure. For example, with your dog in his carrier, he avoids getting an eye injury from flying debris that can occur if your dog rides with his head out the window. You can make the carrier more comfortable by lining it with a favorite blanket or towel. And don't forget to bring his favorite chew toys to keep him occupied and help him relieve stress.

Airline travel is a little more complicated. When your dog flies, he will need to travel in an approved carrier that meets certain size and weight requirements. The U.S. Department of Agriculture/Animal and Plant Health Inspection Service (USDA/APHIS) and the International Air Transport Association (IATA) regulate the transportation of dogs and other pets, and each airline is responsible for adhering to these regulations. For information about requirements and what forms you'll need in advance of your pet's flight, call the USDA/APHIS at 301-734-7833, your travel agent or the airline.

Because some airlines may impose additional rules for transporting pets, ask your booking agent about the specific regulations of your chosen airline, or contact the airline directly.

Most airlines offer these two options for transporting your dog:

• As a carry-on item. Most airlines will allow a small dog to travel with you in the passenger compartment. Your dog must be in an approved carrier that fits under the seat and allows him to sit, stand and rest comfortably.
• As a checked item. If you are unable to bring your dog as a carry-on item due to his size or other limitations, he will have to travel as a checked item in his carrier. Make sure the carrier has plenty of ventilation, has enough room for your dog to stand, sit and rest comfortably, and is of strong construction and an airline-approved carrier.

Your carrier must have grips or handles for lifting to prevent cargo workers from being bitten. Kennels must be labeled "Live Animals," in at least one-inch high letters, on the top and one side with directional arrows indicating the proper position of the carrier. It's also a good idea to have all of your contact information - both for your home and your destination - taped to the outside of the carrier. Always discuss your pet traveling arrangements with your ticketing agent as far in advance of your trip as possible to meet all necessary requirements and avoid any unpleasant surprises at the airport.

Whether you use your pet carrier for a quick trip to the veterinarian or for a long trek, having the right carrier will make traveling with your pet a safe and memorable experience.