In the third mission you have to find 8 chickens for Ucle Hayseed.
The locations are:
1: in the back of the barn (the door is by the car)
2:In the bathroom of the Burning Spoke
3:In the 'general store' with the auction guy.
4:In the front yard of Hayseed Farm.
5:On the sidewalk near the Burning Spoke
6:In the small grassy area with two squirrels across the street from the General Strore
7: In the tiny grassy area linking two roads together near the Burning Spoke
8:unknown