As the days go by, Shaun and the other sheep grow weary of the same dull routine. After one particularly rough day of shearing, Shaun becomes fed up with the farmer. He spots a bus driving by with the slogan "Take a day off" in large letters on the side. Shaun decides this is what the sheep need to do, and starts trying to cook up a plan to make it happen. Trumper, meanwhile, is hot on their trail thanks to his special goggles. Even the most minute strand of wool causes them to set off an alarm, and he uses this to follows their route across the city doggedly, getting more and more angry as the trail winds on with no sign of the actual sheep. He is determined to catch them and exact revenge at all costs. The next morning, the rooster crows and everyone wakes up to business as usual, but everyone is going about it more happily and with more of a spring in their step. The Farmer and Bitzer open the barn and the sheep happily gather round the farmer, glad to have him home again. The moment is almost ruined as the farmer sadly looks at the schedule, clearly wishing for once they didn't have to do it. Bitzer makes the decision for him by grabbing the paper, wadding it up, and throwing it to the goat to eat. One of the original ideas of the movie was the story of the episode of season 1 "Save the tree". But there wasn't much potential in the story for an 85 minute long movie, the crew and the director Richard Starzak (With the help of the story of Mark Burton) created the story of Shaun looking for his owner in The Big City.

The next morning, the rooster crows and everyone wakes up to business as usual, but everyone is going about it more happily and with more of a spring in their step. The Farmer and Bitzer open the barn and the sheep happily gather round the farmer, glad to have him home again. The moment is almost ruined as the Farmer sadly looks at the schedule, clearly wishing for once they didn't have to do it. Bitzer makes the decision for him by grabbing the schedule, wadding it up, and throwing it to the goat to eat. While the Farmer gets ready for bed, Timmy sneaks into the living room. He then sees the pizza box the Farmer forgot to put away. Timmy spits out his dummy and eats some of the pizza. The Farmer is now in his pajamas. After eating some of the pizza, Timmy gets tomato sauce all over his body. Timmy turns the television on by accident to show the horror movie playing. Timmy hops on the chair and watches the horror film but he falls asleep.. The Farmer appears again to turn off the TV but he can't see Timmy, Timmy then wake ups and turns on the TVs, but he feels tired and continues falling asleep. This film was originally intended to be the series finale, but since CBBC wanted more episodes, the series continued. Unlike most episodes of the show, the movie only uses Sheep with previously established identies, with no "extra" members ever seen. It was rumored that the Farmer would be the villain, until they conformed that Trumper would be the main villain.Winner for Toronto Film Critics Association, Best Animated Feature - Mark Burton and Richard Starzak Because the movie is called “Aroooooo”, the premise is possibly about a werewolf. This horror movie would reuse later in the following series, notably in the fourth series episode, Phoney Farmer. Writer and Director Richard Starzak described the relationship of the Farmer and Shaun as "A father and son". Timmy ventures into the Farmer's house to watch a horror movie on TV, making the Farmer think the house is haunted. Originally, the main relationship would be for Shaun, Bitzer and the Farmer, but since the series already showed the relationship between Bitzer and the Farmer, it was instead changed to Shaun and the Farmer, since they had minimal interactions in the series proper.

According to Rotten Tomatoes, Shaun the Sheep Movie is the highest rated film of all Aardman films with an "excellent" 99% rating. As the days go by, Shaun and the other sheep grow weary of the same dull routine. After one particularly rough day of shearing, Shaun becomes fed up with the Farmer. He spots a bus driving by with the slogan "Take a day off" in large letters on the side. Shaun decides this is what the sheep need to do, and starts trying to cook up a plan to make it happen. This is the only Shaun the Sheep film to receive a PG rating from the MPA, as the following sequel would instead receive a G rating from the MPA.