Dogs in the cargo hold: what a physiology study on sled dogs found
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
Flying with a dog too large for the cabin means the cargo hold, a space the owner can neither see nor monitor. A study in animal physiology followed dogs through an actual commercial flight, from departure to arrival. Our guidance is gathered in the dog travel and safety section.
What a study measured during a real flight
Raymond Bergeron, Stephanie Scott, Jean-Pierre Émond, France Mercier, Nathan Cook and Allan Schaefer published a study in 2002, in the Canadian Journal of Veterinary Research, on the physiology and behavior of sled dogs transported by air. Tracking cortisol and heart rate in working dogs shipped in the cargo hold of a commercial flight, the authors documented a measurable physiological stress response concentrated around handling and loading, with values returning toward baseline after arrival rather than worsening continuously through the flight itself.
These are working dogs, physically conditioned to handling and confinement, quite different from a sedentary companion dog, an anxious one, or a brachycephalic breed — a caveat the authors themselves raise.
What this changes for a flight with a dog
- Habituate the travel crate weeks before departure, not the night before: the crate itself shouldn't become the first source of stress. See our guide to the travel crate for dogs.
- Aim for a direct flight to limit the number of ground-handling steps, often more stressful than the flight itself according to this and other road-transport research.
- Avoid a heavy meal before the flight, without withholding water until the last moment.
- Check breed-specific restrictions: many airlines already exclude brachycephalic breeds from the cargo hold, because of a respiratory risk documented independently of this study.
Frequently asked questions
Does a dog necessarily suffer in the cargo hold?
This study shows no continuous decline through the flight, but a stress response concentrated around loading and handling, followed by a return to calm. It doesn't replace an assessment of each dog's health and temperament before booking.
Does this study apply to an ordinary companion dog?
With caution: it covers fit sled dogs used to group handling, not a senior, anxious, or brachycephalic dog. Our general guide to traveling by train or plane with a dog covers the paperwork to prepare.
What are this study's limits?
It dates from 2002, covers a small number of working dogs and a single tracked commercial flight: it doesn't replace a case-by-case veterinary opinion. Find all our guides on the dog hub.
This guide is part of Planète Pets’s Dogs universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.