Troodons will come to your thatch house, move in, kill all your Dino's, kill you every time you spawn, and you'll have to start over. If you see glowing eyes at night it's too late, you can't hide, even in water because they knock you out and you will drown.
As much as i hate making a tip for this demon, put 3 dino gates down in a triangle and close them all. Put the troodon inside with a flyer or lead it in. Get a parge dinos about rex size. Maybe 2. Put it on neutral. Tranq it. Once tranqed use a tanky dino such as a carbonemys and stand near the rex. Release the troodon and let it attack your turtle while the rex slowly dies. If possible place 2 rexs asleep together to kill both at the same time.