Gren rolls his eyes, ad Bigby speaks. There's still a pretty strong part of him that wants to just block out everything that comes out of the wolf's mouth. It's the same part of him that wants to (usually unjustified) rant and rail at him, over things he has no power over - especially so here.

"Gee. That warms the fuckin' cockles of my heart," the sarcasm comes easy at least, he does, at least, note the blood. "Huh, so you ate shit running around Wonderland. Lemmie know if that fucks you over later."

Because he's a little curious. He hasn't hunted anything alive for centuries- but he's avoided the Wonderland wildlife on the off-chance they end up doing the usual insane shit Wonderland is renowned for.