Despite not asking permission, Fluttershy takes it upon herself to care for Princess Celestia's sick pet bird.
Tonight on "Animal Cops: Equestria"
The folk of Ponyville throw a party at the Sugarcube Corner in honor of their royal guest: Princess Celestia. Twilight Sparkle manages to invite all of her friends, but Fluttershy arrives late since she was caring for an injured mouse. At the party, Twilight and the store owner stress themselves to show respect, and leave a good impression, for the princess. This includes refilling her teacup every second and keeping Pinkie Pie's behavior in check. Fluttershy is formally introduced to the princess and her pet bird, Philomena. Fluttershy is shocked to see that the bird is visibly sick and in poor shape, but keeps quiet about it. When Celestia is called away and the guests start to leave, the camera pans over to show that the bird has gone missing.
They have humidifiers in Equestria. And the ponies eat meat. Don't ask me why.
Back at Fluttershy's house, we see that she took Philomena to try and nurse her back to health. However, this proves hard to do since the bird refuses medication and doesn't respond well to initial treatments. In fact, Fluttershy notices that Philomena is getting worse despite trying everything she knows. Later, Fluttershy's problems are made worse when Twilight shows up to thank her for her good behavior; only to notice that she had taken the royal pet. Twilight, though understanding Fluttershy's good intentions, demands that they return the bird before anyone notices. Understanding that she cannot do anything more for her patient, Fluttershy agrees. But as they begin to leave, Twilight is surprised to see that Celestia's royal guards have shown up.
A fate worse than death.
Since she is a pupil of Celestia, the guards inform Twilight of what is going on. Celestia is aware that her bird has gone missing and that the two are out searching for it. (Peace time in Equestria sucks.) Twilight manages to drive them away, but is now visibly panicked.
As Fluttershy begins to leave, Twilight stops and tells her that it is now too dangerous to go out while the guards are out searching for the bird. She warns her that at this point she may be punished greatly for stealing Philomena. Twilight then asks how Fluttershy was caring for her in the first place, and is told that Philomena had rejected everything she had tried. Twilight tells her that she should stop being a pushover and employ some 'tough love'. But when she tries to force Philomena to eat the soup Fluttershy had prepared earlier, the bird escapes.
The girls chase off after Philomena while avoiding the attention of the royal guards. They chase the bird into town where they catch up with her, and the rest of the gang, at the town's fountain. On top the fountain, Philomena croaks and falls over. Fluttershy launches herself over to catch her, but the bird bursts into flames and leaves nothing but ash in Fluttershy's hooves. Celestia arrives at the scene and is surprised at what she sees. Fluttershy and Twilight both try to take the blame for what happened, but Celestia simply walks over to the ashes and tells the pile to stop scaring the girls. Out from the ashes, Philomena arises in a majestic form; much to the surprise of the girls. Fluttershy is told that Philomena is really a phoenix, and that she was simply going through one of her rebirth phases. (which Celestia admits are rather "melodramatic") Fluttershy learns that she shouldn't have jumped to conclusions and if she had simply asked, she would not have had to go through all the trouble.