At this point he's expecting the worst or something even worse to happen, so his fur is sticking up quite a bit on his back, so it sounds legit.

"Sorry, I just--you sure you're all right?" He squints, just a little, wanting to make sure nothing else terrible was happening. "I'd get you somethin' to drink but I don't wanna leave you all by yourself here."

Much less the danger she might be in since she can't move.

"I guess we can only hope that this don't last too much longer or someone's got a cure." As much as he hated what was happening to him right now, he could deal with it for as long as he had to. Nil was actually and actively ill, and at least he wasn't tossing out teeth and organs left and right.