The pug is a breed of dog with physically distinctive features of a wrinkly, short-muzzled face, and curled tail. If body temperature reaches 108 °F (42 °C), organ failure can occur. Their breathing problems can be worsened by the stresses of travelling in air cargo, which may involve high temperatures. Following the deaths of pugs and other brachycephalic breeds, several airlines either banned their transport in cargo or enacted seasonal restrictions.
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