[For the moment he's so focused on his first aid that he doesn't feel the eyes on him, though after a bit as he gets the flow to at least slow down, he flicks his glance toward Zoro's face, almost but not quite meeting his eyes.]

Hmph. Yeah, well, just goes to show you're not invincible yet. Here, hold your hand right here for a bit while I clean you up.

[Chopper would give them both hell if they came back with dirt in their wounds and gave themselves fresh scars. His eyes travel the length of the one across Zoro's chest, making him pause for just a moment before grabbing Zoro's hand and placing it where his own was, so he could bandage up that shoulder.]