A French bulldog in respiratory distress was saved by fast-thinking JetBlue crew members on a recent flight, according to a report.

Three-year-old Darcy and her owner were flying from Florida to Massachusetts on Thursday when the pup’s tongue and gums started to turn blue inside her carrier, according to ABC News.

“We all are affected by cabin pressure and oxygen fluctuations, human, canine and feline, etc., but the fact that the Attendants were responsive and attentive to the situation may have saved Darcy’s life,” owner Michele Burt wrote in a thank-you letter to JetBlue, which was posted on Facebook.

Two flight attendants first brought over ice in bags and then an oxygen mask to help Darcy breathe.

Photos that have since gone viral on social media show Darcy sitting in a window seat with the yellow oxygen mask up against her nose and mouth.

The four-legged passenger was being treated for hypoxia, an oxygen deficiency that can be deadly, ABC News reported.

“I placed the mask over her face, and within a few minutes she became alert and after a short time she didn’t want the mask,” Burt wrote. “I believe [flight attendants] Renaud and Diane saved a life, some may reduce the value of the life because Darcy is a canine, I do not.”

Burt went on to say that the two flight attendants “were the helpers today. It may have been only a ‘dog’ to some, not a major disaster certainly, but a family member to us.”

“Goodness and kindness along with the ability to assess a medical crisis, albeit a canine in crisis saved the day.”

Burt reported that Darcy has since “made a complete recovery,” according to the letter.

One of the dog-saving crew members, Renaud Fenster, told ABC’s “Good Morning America” Monday that in his 15 years of working for an airline, he has “never seen anything like this.”

“I was passing through the cabin to check up on a passenger, and I noticed [another] passenger, who had the dog out of her crate and the dog had an indication that it wasn’t looking too well … And I believe the dog passed out,” Fenster said.

“The dog started panting very rapidly and uncontrollably, and so as a French bulldog owner myself, I knew the dog was overheating and needed some ice. I brought the dog some ice, and that didn’t do anything.”

Fenster then said he “decided that we needed to consider using oxygen to support the animal.”

“So I called the captain, and I told him, ‘I think I need to use some oxygen,’ and he said, ‘Go ahead.’ And right then and there, placed the oxygen on the dog and the dog revived like nothing else,” he said.

JetBlue said in a statement: “We all want to make sure everyone has a safe and comfortable fight, including those with four legs.”

“We’re thankful for our crew’s quick thinking and glad everyone involved was breathing easier when the plane landed in Worcester.”