Find a tail of a blind dog

 is an optional, repeatable side mission featured in S.T.A.L.K.E.R.: Lost Alpha.

"To find and bring Sidorovich ordered part of the monster."

- Sidorovich

Overview

 * One of the first side-missions you can pick up in the game.
 * 1) Find a Blind Dog, kill it and loot it's tail.
 * 2) Return to Sidorovich for the reward.

Trivia

 * The apparent anomaly with the mission duration is quite genuine and equally inexplicable.