[Telchar]

Arod was a pony.

I think not...

A smaller and lighter horse, but restive and fiery, was brought to Legolas. Arod was his name. But Legolas asked them to take off saddle and rein.

Smaller than Hasufel, yet a horse.

'Now I understand a part of last night's riddle,' said Legolas as he sprang lightly upon Arod's back. 'Whether they fled at first in fear, or not, our horses met Shadowfax, their chieftain, and greeted him with joy. Did you know that he was at hand, Gandalf?'

For indeed these are your own horses that we ride, as you knew well are you asked, I guess. But seldom does thief ride home to the stable. Here are Hasufel and Arod, that Éomer, the Third Marshal of the Mark, lent to us, only two days ago.

And the most precise and concluside:

But Arod, the horse of Rohan, refused the way, and he stood sweating and trembling in a fear that was grievous to see.

So no go - sorry