The face is because Jake should know better, but he knows he can't tell Jake to know better, because then he'll just complain and honestly, would he love the man as much if he didn't get into these messes? Well, yes. But it might be just a bit more. He lets out a huff, but shakes his head. "Read notes," is what he says, stabbing the notepad with his pen as if to make a point.

He's going to make Jake memorize Cougar's little bestiary and notes on the plants if it's the last thing he does, just to avoid more instances like this.