Neverwinter Forest When you sit all alone with the weeds?

Dante had told Osprey he wouldn't wander far and would take it easy until he felt better.  Well, today he'd felt better.  Not one hundred percent, of course, but enough to where he had decided to make a short trip tracking a herd.  He couldn't hunt the darn things but he could see where they were headed for the others.  Besides, no matter what Os may say, he really hated the idea of passing this on to her, and he was convinced now that it was contageous.  So it was an excuse to stay away as well.

That had been a mistake.  He tired quickly, slowing to a walk as he neared Neverwinter forest, and a fit suddenly overcame him.  Hacking, he wretched in the grass, phlem that seemed to always be there coming up.  Wheezing around his slightly obstructed throat, he shivered, muzzle hovering above the grass as he fought to bring up the blockage.

What the hell was wrong with him?