I know one good way to escape a troodon that has bit you. If you are near or a river or any body of water run in it just enough so the troodons can't get you. Also make sure your head is above the water or you'll drown. I'm pretty sure this method works but don't hold me to it.
At lvl 72 with flak armor on, a lvl 5 Troodon knocked me out with one attack at night. Last thing I saw was those glowing eyes before passing out. My Guess is that they attack vital organs. Luckily my Doedicarus was up for a game of baseball and launched that little devil out into the stands.