Continuity: Copper is chasing a white rabbit and turns into a puppy, then back into a dog, for a brief moment. This was on the DVD.

Continuity: When Chief is chasing Tod through the forest, Chief still has his barrel attached to his collar, yet when it cuts back to Copper both barrels are there.

Continuity: When Tod goes up to Chief saying what big teeth he's got, Chief's teeth are perfectly white. Then later when Chief is chasing Tod, his teeth are a noticeable yellow.

Continuity: Chief is tied to his kennel around the collar. But when Copper cuddles up to him for the first time, the rope tied to his collar disappears for a shot.

Continuity: The hole Boomer makes in the front door disappears when Widow Tweed finds and brings Tod into her home.

Continuity: In one scene, Tod runs near Copper's barrel and calls "Copper!" In the wide shot of him calling, there is no red water bowl near Copper's barrel, but in the closeup the water bowl appears.

Continuity: As Copper enters his kennel in one scene, there is a hole in the barrel, for where the rope is tied, to make sure the dogs can't run off. In one shot the hole is there, then disappears, then reappears once again.

Continuity: When Widow Tweed first finds Tod, she pulls the pink trousers off of him, and leaves them on the ground. Then when she takes Tod and walks towards her house, the trousers have gone.

Continuity: Chief's red water bowl goes from being in front of, to by the side of his kennel when Copper is introduced to him.

Continuity: The number of markings on Boomer's chest changes frequently.

Deliberate "mistake": We see Boomer the woodpecker peck the end of a tree branch off in an attempt to get the green caterpillar. When the branch falls, Boomer stays in midair for a second, then he falls to the floor. But being a woodpecker, why not just fly from the ground instead of continuing to fall?