A family who flew from Houston to NY made a horrifying discovery when they landed Monday night after a United Airlines attendant told them to store their 10-month-old French Bulldog in the overhead bin.
Gremminger said on Twitter she wants to find out the name of the dog's owners so she can help them.
United Airlines said they take full responsibility for the incident.
"They assured the safety of the family's pet", she said.
Another passenger on the flight posted a photo on Twitter of the dog's owner and children after the plane had arrived in NY.
CBS News reported on the story, which went viral after a passenger on the flight posted a photo of the dog, who was named Papicito, after it died.
The ten-month-old puppy boarded the plane in a standard pet carrier and was placed under the seat in front of its family, in a fashion most flights with animals request.
When the woman was forced to place the dog in the overhead bin, Gremminger exchanged glances with the man next to her.
United called the incident "a tragic accident that should never have occurred, as pets should never be placed in the overhead bin".
"However, the flight attendants of flight UA1284 felt that the innocent animal was better off crammed inside the overhead container without air and water. Her daughter was also crying", she said. They lost their dog because of an @united flight attendant. "My heart is broken", Maggie Gremminger tweeted. "We are thoroughly investigating what occurred to prevent this from ever happening again".
Gremminer said she has been offered $75 credit by the airline which, she said, just makes things worse.
Last year, 18 animals died while being transported on United - there were six cases on all other USA carriers combined, according to the Department of Transportation.
According to United Airline policy, dogs are permitted on board flights as long as they are kept inside a kennel, which must fit completely under the seat in front of the customer and remain there at all times. Although nothing can replace the dog, it's good to know United is working to get to the bottom of the situation.