Lykos took the second watch, not needing, nor actually requiring, significant continuous amounts of sleep like the casters. Once his watch was over, assuming nothing happened, he returned to sleep without much encouragement. The next morning, he was already up as the sun dawned, and making a large breakfast, not sure how much the new 'friend' and 'ally' needed. Better to make extras and use those for lunch than not enough and waste time.