if you wish to edit or remove any of the other tiered spawns you can use the following options.

[ZytharianCritters]
SpawnTek=TRUE True/False Disables the entire group.
SpawnBone=TRUE True/False Disables the entire group.
SpawnFeathered=TRUE True/False Disables the entire group.
TekChance=5 0-100 Percent chance for this group to spawn.
BoneChance=5 0-100 Percent chance for this group to spawn.
FeatherChance=5 0-100 Percent chance for this group to spawn.
DestroyTimer=1 1+ This determines how long after creating the new creature to destroy the old if enabled

Replace the classname with the creature in my mod.

PreventSpawn:Classname_character_bp_C=True Prevents a certain class from spawning in the % chance system.
DestroyOriginal:Classname_character_bp_C=True Should the % chance spawned creature destroy what it spawned from.
TargetDino:Classname_character_bp_C=Dinoname The name of the creature that the dino should spawn from.