QANTAS is under fire for not allowing American Staffordshire Terriers on their flights - but allowing crocodiles.

A petition on Change.org calls on the national airline to drop the "discriminatory" ban on freight transport of the breed.

Dog lovers across Australia have taken to the online site to express their disgust at the restriction, with more than 1400 people signing the petition.

"These dogs are not a restricted breed nor are they dangerous. Please do your research Qantas," wrote one dog owner.

Another supporter begged: "Please don't discriminate against such a loyal, gentle breed."

"Qantas has procedures in place to allow it to transport lions and crocodiles , but it won't transport an American Staffy," she said.

"The travel ban is ridiculous, it's having a big impact on American Staffy owners, breeders and rescue shelters and it's time for Qantas to change its decision."

Pauline told Change.org that in addition to hundreds of signatures and comments, Qantas was coming under fire on Facebook. Dozens of dog owners have stormed the Qantas Facebook page and are threatening to boycott the airline.

Qantas released a statement on the social network as the anger grew.

"Safety is our first priority, including that of our employees, and certain breeds are not permitted to travel on Qantas flights as they are traditionally known to be aggressive or highly agitated animals. Also, certain breeds of animals are not permitted to fly on flights over a certain time period due to respiratory issues."

Dogs that have problems with excessive chewing or cage destruction are also not allowed.

Ms Steele said she was hopeful that Qantas would agree to work with all relevant parties to find an acceptable solution.