New international rules covering the transport of animals on aircraft have been developed by the organisation that represents most airlines.
The International Air Transport Association says a new standardised global certification programme will improve the safety and welfare of animals travelling by air.
"Last year millions of animals travelled safely and securely by air. Animal owners and shippers rely heavily on airlines to carry their precious cargo. As an industry, we have a duty of care to ensure that standards and best practices are in place around the world to protect the welfare of these animals," said Nick Careen, the association's senior vice-president of airport, passenger, cargo and security.
The risks were highlighted last month when a dog died on United Airlines flight after its owner was instructed to put the animal in an overhead bin.
The airline said it transported 138,178 animals last year and 18 died, the highest of any airline, according to the Department of Transportation.