I just started watching BoJack Horseman(Season 1 Episode 1) and noticed when a character asked BoJack if he was drunk, he said "I weigh over 1200 pounds." He certainly doesn't look like he weighs that much.
There are several other references to his weight as well such as the restaurant scene where he eats a large amount of bread and then he tries to redirect the blame for his girlfriend leaving him by saying "You think I'm fat."
Is this hint of his weight being "1200 pounds" just a rhetorical device, or is it an indication of him actually being a regular horse? Are there other indications that characters are actually non-morphic in nature?