The building says M Zimmermann Co, and Zimmerman is a German name, so I think it's more just a slaughterhouse thing.

I picture someone whose career is in butchering cows looking at the fancy new facade of the bank that ripped them off and thinking "one day, my butcher shop is gonna have a fancier front than than that stupid bank, only instead of weird mythical animals, I'm gonna have cow heads, I mean, I have enough of them, you need one to sculpt? I got one right here!".