“It seems dog was considered a fine meal during our Revolutionary days, at least according to the dialog in the movie The Patriot.”
I really doubt it. “The Patriot” is not exactly a reliable historical movie.
AFAIK, the only times dog was eaten by Americans in colonial or early national years was when they were dining with Indians. Lewis and Clark describe such meals several times in their report.
I have no idea of the context in the movie.