Which of these animals can normally only breathe through their noses?

Player #272443, I would "talk" to my horse by breathing at his nose. this always worked even when you meet a new horse because they know your not a threat. ♥️

They also cannot vomit. This is a problem if there's a blockage.

RushMama2112, can also sleep while standing

I live not far from a horse paddock, I know the lady who owns it quite well, she told me about a horse that lived there years ago that used to get hay fever every spring like clockwork, so the vet had to come out & give it an injection.. goes to show the similarities with humans

I always felt sorry for Hoss Cartwright’s horse.

quicksilver, I've done that sometimes myself