Live animal transport by aircraft involves significant welfare risks from temperature extremes, hypoxia, noise, and handling that affect millions of animals annually.
Animals transported by air experience multiple simultaneous stressors: noise from engines, vibration, temperature fluctuations, restricted movement, and in some cases oxygen availability changes at altitude. Day-old chicks transported internationally arrive dehydrated and stressed after journeys of 24-48 hours. Brachycephalic dogs in poorly ventilated cargo holds can die from heat stroke and respiratory failure. The welfare impact on billions of fish and invertebrates transported for the aquarium trade by air is poorly studied but significant.