You can't bring full-size shampoo on a plane. Apparently, you can't bring your emotional support peacock either.

United Airlines turned away Brooklyn artist Ventiko and her big bird Dexter, after she tried to bring the service peacock onboard her flight from Newark Liberty International Airport to Los Angeles.

Ventiko even bought the colorful bird -- which has its own Instagram account --its own seat, but it was still denied entry past the ticketing area of the airport, United Airlines spokesperson Andrea Hiller said.

"The animal did not meet guidelines for a number of reasons, including its size and weight," Hiller said. "We explained this to the customer on three separate occasions before they arrived at the airport."

It was a six-hour ordeal, according to the bird's Instagram. Dexter typically travels through New York via Uber or subway, just like any other New Yorker, according to The Cut.

Peacocks have a wingspan of up to five feet, can weigh up to 13 pounds and grow between 35 and 50 inches long, according to Wildlife Waystation.

In January 2016, a turkey boarded a Delta flight as an emotional support animal, USA Today reported. And in October 2016, Daniel, an emotional support duck, flew from Charlotte to Asheville, N.C., according to the Washington Post.

The airline has seen a 75 percent year-over-year increase in customers bringing emotional support animals on flights, as well as an uptick in onboard incidents involving those animals, Hiller said.

"We know that some customers require an emotional support animal to assist them through their journey," she said. "In our effort to better balance protecting our employees and customers while accommodating passengers with disabilities, we are reviewing our existing policy and plan to share more soon."

The entry denial comes on the heels of Delta Airline's announcement to crack down on service or support animals, citing an 84 percent increase in animal incidents including urination, biting and an attack by a 70-pound dog.

Effective March 1, Delta will require passengers traveling with service or support animals to show proof of good health and up-to-date immunizations with 48 hours notice, according to a statement.

A signed document confirming the animal is trained and can behave for the duration of flight will also need to be presented prior to boarding.

Sophie Nieto-Munoz may be reached at snietomunoz@njadvancemedia.com. Follow her at @snietomunoz. Find NJ.com on Facebook.

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