Toothless, luckily for Duo, was sleeping. While he wasn't snoring, his deep breathing could be heard whooshing in and out of his large nostrils, steady and equal.

He looked physically relaxed, but his posturing suggested he knew how alone and away from home he was. He was curled up in a position that likely wasn't comfortable at all, but he slept through it anyway. He'd probably fallen asleep that way- trying anything to comfort himself before mental exhaustion claimed him.