Flight attendants are applauding the U.S. Department of Transportation’s (DOT) bid to restrict the types of animals allowed in cabins, saying emotional support animals have threatened the safety and health of crew members as well as passengers.

Amid a surge in passengers claiming that their emotional support animals – of many species – must fly with them in the passenger areas of planes, the DOT has released a notice of proposed rulemaking that seeks to amend the definition of a service animal in air transportation.