According to the report, the former employees attempted to bring their animal welfare concerns to United's attention to no avail. Despite being presented with pictures of dogs suffering on hot tarmacs, the company has failed to address the allegations of neglect thus far; United released a statement that claims the company couldn't respond to the whistleblowers' claims.
Additionally, the investigators found, "finding out who is accountable is harder than it sounds":
By law, airlines that transport animals must report incidents directly to the Department of Transportation. Those reports are sent once a month to the USDA, which can then investigate and take action [...]
The DOT told us that the rules require airlines to report the "loss, injury or death" of pets while in the custody of the airline. "Illnesses are not required to be reported," said [a] spokesperson. If [a pet's] injuries were determined to actually be "illnesses" the incident would not have to be reported.
"Bottom-line is they need to change procedure," one of the former handlers told NBC. "Change regulations for the health of the animals. Not for the sake of making money... People need to be held accountable."