Saving (or Savaging) Sergeant Teddy

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough

 * 1) Talk to Melody, a child slave at Fortification Hill.
 * 2) Find Legionnaire Antony and agree to fight in the Legion Arena for the bear. This can be avoided with a good reputation with the Legion or the Animal Friend perk. You may also pickpocket the teddy from Antony or kill him.
 * 3) Return to Melody.
 * 4)  Tear the bear in half in front of her, resulting in Legion fame and bad karma.
 * 5) Give her the bear, for good karma.

Behind the scenes

 * It is possible that the two ways you can finish this quest is a reference to a quest in Fallout 2 for Curtis, where you have to recover his Mr. Nixon doll. You can give it to him or rip it up in front of him.

Bugs

 * Prior to patch 1.2.0.314, the Legion mongrels could have 1600 hit points and be very time consuming to defeat.