united airlines
A United Airlines airplane on JFK International Airport, New York City, runway, Dec. 10, 2002. Mark Mainz/Getty Images

Amid a slew of controversies, United Airlines was accused Friday of losing rapper ScHoolboy Q's dog after putting the animal in a wrong flight. The rapper, whose real name is Quincy Matthew Hanley, asked the airline for an explanation on Twitter.

The airline responded to his tweet, saying,“We want to look into this further. Please DM us the airway bill. ^MD.”

Read: Emirates Airline Caught Pouring Unused Champagne Back Into Bottle

ScHoolboy Q told TMZ that the dog was a French bulldog puppy he recently purchased from Denver. The dog was supposed to be delivered Friday. The rapper added a dog arrived at his house, but it was not the one he purchased.

He also told TMZ that he was "pissed" due to the incident and planned to sue the airline.

This is not the first time the United Airlines has come under fire for an incident involving a pet. In February, a Michigan woman blamed the airline for the death of her healthy dog.

Kathleen Considine said her golden retriever died shortly after the pet reached Portland, Oregon in a United Airlines flight from Detroit. "Nothing will bring my baby back, but I am asking everyone to please share this post so nobody else has to go through this terrible tragedy," Considine posted on Facebook.

"United Airlines "PetSafe" program is cruel. They treat animals like baggage. They did not care if Jacob had food or water or any time out of his cage."

See posts, photos and more on Facebook.

The airline responded at the time saying the dog "showed no signs of distress" during the journey.

"The customer had booked the animal in a 500 series and the dog arrived in a 700 series crate — and that crate was simply too big for the flight," United public relations manager Charlie Hobart told Fox News at the time. However, he noted an agent in Detroit "mistakenly told the customer that we’d be able to get that crate on the [final Portland-bound] flight."

Read: United Airlines Gives Toddler's Seat Away On Flight

According to a report from the Department of Transportation’s Air Travel Consumer Report, United Airlines has the worst record of U.S. airlines on pet deaths on planes in 2016. In 2016, nine pets — eight dogs and a Sphynx kitten — died under the airline’s care and 14 suffered injuries. The airlines said the injuries were “self-inflicted.”

In 2012, fashion model Maggie Rizer's golden retrievers died on a United Airlines flight from New York to San Francisco. A necropsy found that the dog died of heatstroke. The airlines issued a statement later saying the dog had been in a temperature-controlled environment during the entire trip.