Continuity mistake: When Clinch and his gang start to chase Albert, from his house, many of the sheep start running and moving out of the way, even kicking up dust. When the camera angle changes, none of the sheep are moving and there's no kicked up dust.
Trivia: Ewen McGregor has a cameo in this film after he turned up on set to visit Charlize Theron and Liam Neeson. Seth Macfarlane asked him if he wanted to do it for fun, but it had to be done that day as he was filming nearby. The whole scene was done off the cuff, and he is uncredited.
Trivia: The man Clinch shoots at the bar when he first gets to town is Ryan Reynolds, who is uncredited. Reynolds has also appeared in Seth McFarlane's "Ted" (for which he was also uncredited) and "Family Guy."
Anna: You're a good sheep farmer! Albert: Oh my god, please! I suck at sheep. Louise was right, I can't keep track of them. There was a sheep in the whorehouse the last week. Anna: Really? Albert: Yeah. Wandered in there, and then when I went to pick it up, somehow it had made 20 dollars.