I remember encountering these once and only once. I was mining stone, not realizing a whole pack of these were around me. They attacked me and put me to sleep immediately, which wasnt ttoo bad, my base was close by, but they werent doing ANY DAMAGE. I was stuck in an endless sleep loop. I waited for a while, hoped they would do some damage, kill me, something, but eventually I just shut the game down. Came back dead, but free again. Now I sit back and send my raptors to tear them to shreds with stimberries handy.

Short story: Troodons kept attacking me but not doing any damage. Stuck in endless sleep loop. HAVE STIM BERRIES.