Best way I've found to tame them (if you don't have access to baby wyverns) is to feed them baby carnos. Carnos can mate once a day and it gives a good amount of xp. It is possible to tame multiple troodons at once but extremely difficult. If one troodon tames before the other it will eat the tamed one.
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.