Just tamed a 150 on a 5x taming unofficial server. DodoDex said 8 beers, which has been fine in the past. This time it took me 13 beers. Not sure what's been changed, but be sure to bring extra while taming! I didn't have to wait the 5+ minutes between the first and second feeding and the time between feedings was much quicker then usual. DodoDex has been notified of this issue.
To tame this creature you have to passively tame it, the best way of doing this is to put on a full set of ghillie as that supply's stealth, then you Aproach it from behind crouching and Feed it a beer!