TAMING DOES NOT WORK. These creatures are non-tamable and if you look at the more section here on dododex it says it isn't tamable. Those people who are saying they are tameable are wrong. Up this so newbies and seasoned players alike don't waste time on false rumors.
If you use the admin command force tame then ride it you will become the seeker I was messing about on gen1 to find the glitch but not sure if it turns you into the seeker anymore since I did this around a year and a half ago
Tried this "taming" method on official servers and on singleplayer both. Did not work. Used 12 bulbdogs on one, on the other 11 bulbdogs and 10 shinehorns. I had a trap for the seekers with a 1x1 box border around it, lightpets pressed against the wall. I even threw 50 glowsticks in the box with the seekers. No tame. I demoed the middle walls to see if they were blocking the light, and still no taming. Reckon the comments saying you can are just messing with you to waste your time. Or they are on unofficial/modded servers.