A pig was ordered off a flight in Connecticut on Wednesday after crew members determined that it had become disruptive.

At the Bradley International Airport in Windsor Locke, the pig was forced off the plane even though it was supposed to be a passenger's emotional support animal.

Laura Masvidal, a spokeswoman for U.S. Airways parent American Airlines told the Associated Press on Friday that the pig was brought aboard by a passenger as an emotional support animal.

She said both the pig and its owner left the aircraft before it took off.

Jonathan Skolnik, a University of Massachusetts professor who was also a passenger, told ABC News that the pig - which he estimated to weigh about 50-70 pounds, was on a leash but began walking back and forth.

Masdival also told the news outlet that under federal guidelines, emotional support animals are allowed on commercial flights as long as they're not disruptive.