When Mayor Bulloney tells Boothill to keep the hoax for more time, he says he'll write a letter to his congressman as soon as he learns how to write. If Boothill is illiterate, how could he impersonate a teacher in "School Days"?
While getting dressed, Cody reveals that unlike Moo Montana and other similar characters, he has plantigrade (human like) feet with hooves for toes and not hooves for feet which Moo and others have. This helps explain why Cody and other Mesa residents are able to wear Human footwear: they are built for them naturally.
This is the first time that Cody is shown living with Miss Lily Bovine. Previously, it was implied.