Sanguine elixers work on these guys but u have to get the friendship meter full first I built 2 traps on gen 2 that are big enough for them to walk around in a small space out of a behemoth gate and 8 dino gates I play on pvp and left it unlocked so the whole server can use if they want it's pretty effective got a mate pair of low level ones this morning just to test and now looking for higher levels