When Old Jones grabs the dynamite out of the box, he has three sticks in each hand, but when he puts his hands together a seventh stick appears from nowhere. Then, when he lights the fuse, there are twelve sticks in the pile.
At one point the phrase "with sheets" is hastily added to the first rule, but in subsequent shots of the rules it is no longer there.
After the first battle, the colour of the puppies changes between shots - cream-ivory coloured when they are first introduced, grey when Napoleon takes them up into the barn. (A restored version corrects this error with the puppies retaining the grey colour all the way through.)
The color of the building next to the Red Lion Tavern changes from pink/red to white in one scene. The seats out the front of the tavern have disappeared in the same scene.
On more than one occasion, the humans are shooting double-barrel shotguns several times without having to reload. A double-barrel shotgun can only hold two cartridges at a time which gives the user two shots before they have to reload.