My Little Pony: Friendship is Magic - Season 1 Episode 22 -

During a visit from Princess Celestia, Fluttershy sees the Equestrian royal's seemingly sick bird named Philomena. Without the princess noticing, the pegasus takes the poor creature home and tries to take care of it, only to find that this job is much more difficult than with her other animals. The situation takes a turn for the worse when Twilight gets involved and Celestia and her guards notice the pet missing.