You do not need to use grapples in the ferox cave. Just jump in the water after the ferox enrages. If you have a bloodstalker hanging on the wall out of the attack range of the ferox will aggro it. You're welcome for saving your grapples.
As of 3/28/20. Ferox will tame at the wrong level but once put in cryopod will correct to tamed level. A live 145 changed to 217 once in pod post tame. Also dododex is not accurate on x3 possibly x1. The same 145 took 20 element for full tame. At 5% per element.
Taming non violent my ass. To tame these you have to passive tame it using element. When you feed it once you should grapple to a nearby cliff and wait for it to get all cute and cuddly again. Repeat untill its tamed. It is worth it though. When its tamed it can go on your shoulder and when you feed it element it turns into the big “thing” and it is then rideable. Females have to be at addiction level 90% to be able to mate. You get a higher addiction level everytime you feed it element. A higher addiction level requires more element everytime you want it to transform. Nothing happens when it reaches addiction level 100% it just gets some new animations and it looks hyperactive and jittery. HAVE FUN!