Did Arwen become a horse?

[Ringfenwen]

your right that it's brego. We bought the TTT picture movie guide, cos I'm using lotr in my art course work, in it it says thar aragorn released brego when they left for helms deep,coz he was rili stressed and mental, and aragorn said he had seen enough war! That's how brego appears. personally though, i was worried that he'd bite Viggo's nose off while he was unconcious. looked a little dodgy anyway!