So... I went ahead and asked. Half of them just shut their mouths, the other half said that keeping their jaws closed was weird and keeping their jaws relaxed but their lips closed was weirder... I dunno what to do with this information but now you know what I came to know
The dog says bow-wow, the cat says meow, the cow does not say moo, no matter what the nursery rhymes say. It sounds more like *raspy inhale* followed immediately by baaaaaa!, some languages write it as humba, it looks weird when written but I agree with this far more than moo; the goat says meh-meh (trilling and dragging out the 'h', they most definitely do not say "ba"), so what does the fox say? well they laugh like a One Piece character, it does not sound pretty. Now, what does the man say?