Make a trap in the redwoods with a ramp for them to go in or forced in. Hatch the egg right next to trap then hurt the baby Dino till it has little to no health then lead into trap. Does not always agro babies so bring a shield and jump in with the baby and camp the baby as the troodon will attack the player with an AOE thus killing the baby Dino.
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.