Last night my tames and myself got annihilated by an alpha raptor.
My base is located at about 50:20 on the west side of the main map. Been there for about a month now and have been practicing my taming, and dealing with larger carnivores. Last night I saw a raptor running around with a red glow in the same field as my base (I had no idea what the red signified). It saw me and attacked faster than I've seen before, killed me and all my tames. I spawned back in my bed, and went after it with my bow and narcotics arrows. From a good vantage point I hit it with 15 arrows in the head and it didn't miss a beat and killed me again.
Lesson learned, don't mess with the alpha