Why did they feel the need to use the word colt? A good rule of writing, if a generic term will do, use it (if you're not going to actually check any facts at least). Don't expose your own ignorance by trying to be specific. It's like, I'm looking at a bowl of pasta, I could say "look at that bowl of pasta" or I could say "look at that bowl of cous-cous". Is cous-cous a pasta? I don't know. But now we have to discuss it, AND turns out I'm an idiot because I got cous-cous confused with pene.