A single Compy is never an issue. Due to there curious nature of humans they'll walk right up to you and observe you without hostility. But after they see you they will send out a call to nearby Campus beckoning them. Once another Compy is close enough to get a pack bonus they loose there neutral mentality and the pack mind takes over and they become hostile to beware of multiple Compys.
Very dangerous, very annoying. Also kinda cute. This is the compy, or compsognathus. It is a pack dino, which means it gets a pack bonus if there are other compies around. They are very small, which means if you attack one, others could quickly stream out of the small berry plants. However, they are relatively slow and quite low on health, so if many threaten you, don't bother fighting them. 1. Because it's a bad idea for new/low lvl players. 2. Because they barely give any hide or meat