Something is telling him to really pull back, escape the situation. In hindsight, he'll learn that listening to his feeling would be in his best interest, but for now his only friend is bleeding and... talking about being hungry?

"I don't understand." But his hand finishes it's motion, pressing against the side of Zero's neck, in case he's still bleeding profusely. "We should get you some help.

"Are you dizzy? You must be... you're bleeding so much..."