Factual error: In the scene where Spirit's mother is giving birth to Spirit, after she has him it shows Spirit as a newborn, with teeth. Newborn horses don't have a full set of teeth. (Time)

Factual error: Near the beginning of the movie, there is a shot of Spirit galloping at the head of the herd. This is incorrect as the stallion never leads a wild mustang herd - the lead mare does. The stallion often remains at the back, to make sure that no one gets left behind.

Revealing: After Spirit gets his second wind when the Colonel is attempting to break him, he breaks the girth/cinch strap by catching it on the fence. At one brief point, the pole of the fence actually appears to pass between Spirit and the girth of the saddle.

Continuity: When Spirit is on the train and arrives at the camp, the people are doing repetitive actions in the following shots.

Other: Fleeing with Little Creek from the fort, Spirit destroys small railing to free horses tied to it. But after the pole gets torn off, it leaves an empty space on the ground, without any hole or at least broken remains.

Continuity: In the scene where Spirit is first captured by the U.S. soldiers, the rope around his front leg changes position from pulling his leg straight out in front of him to passing between his front legs and under his body, forcing his foreleg to bend. (Time)

Continuity: Near the beginning of the movie, when we first see the Cimarron herd galloping by, there are numerous horses that disappear and reappear as the camera angle changes.

Other: The scene where Spirit is tied to the post at the army fort the length of rope is longer than in the scene a couple of minutes later. (Time)

Continuity: When Spirit pretends to be dead while pulling locomotive, and they take the chains off him, he has a halter on his head. Yet two seconds later, the halter is gone.