In Chapter: 12, Buck Gordon's hat changes back and forth throughout the chapter. Sometimes he's wearing his original white hat, and sometimes he's wearing a black hat.
In Chapter: 4, when the coyote is shown, you can see the collar and wires holding him in place. Plus that's not his howl you hear, because he isn't howling.
Featured on TVT (TV Time Classics) But missing Chapter: 12.
Although the story takes place in the horse and buggy/stagecoach era, all of Madge Bellamy's hairstyles and clothing are strictly in the early-1930s mode.
In Chapter: 2, when Gordon sits down on the ground, you can see the boom mic shadow moving around in the lower right.