Darcy the French bulldog was on a JetBlue flight from Florida to Massachusetts with her pet mom when she showed signs of distress. The three-year-old dog was having difficulty breathing and her tongue turned blue. Michelle Burt, Darcy’s owner, was surprised when crew members came to the rescue with an oxygen mask for the pup. The dog was suffering from hypoxia, a lack of oxygen. Within a few minutes of Burt holding the mask over her furbaby’s face she started to get better.