Same here. In my case, I was able to tame hyaenodons in my previous game, but am unable to do so in my current one which runs both IT and the awesome Kraken's Better Dinos. Neither bait nor the vanilla passive method work because taming plummets back to zero in a matter of seconds.

If Better Dinos creates the new Hyaenodon as a copy instead of a child of the original, IT can't prevent the natural affinity decrease that regular Hyaenodons have, as the copied version is essentially a brand new dino class.

My server admins just changed it to it anti tames due to it not working