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.
Absolutely love these little gremlins. They like to come ip to you and stare at you for a moment, then attack when the pack is assembled. THEY ONLY EAT REALLY QUALITY MEAT! Also, the babies are, like, microscopic, so I’ve had several cases of one escaling out the door and never seeing it again (then getting a “Coraline, Lv. 6 (Compy) died!” notice a few minutes later :(), so if you must breed them, make sure you have TONS of prime meat (which spoils VERY FAST) and make sure the babies stay in a secure location because they are FAST. My favorite thing to do is have a pack of, like, 20 folowing me around and watch as they take down a Raptor nearly effortlessly. Hilarious (also, VENGEANCE >:)).
These guys are best tamed with two people. Have one person knock it out and the second person rUN for that prime meat you shoved in your fridge for kibble. They wake up quickly so have a lot of narcs on hand. They're really not useful but my god are they cute in your shoulder.
Breeding compies is messed up. When the female lays the egg it spawns where you tamed her. So if you tamed her on the beach, and brought her back to your base,the egg will spawn on the beach! I don't know why, but it spawns where you tame
They do gain a squadron boost so having many of them is very useful, they are only tamable using prime meat for some odd reason, having tons in an air locked base on aggressive will for sure do some decent damage,