Dododex
ARK: Survival Evolved & Ascended Companion
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I managed to tame one using a high level beelzebufo (not too much higher level than the kapro otherwise its attacks will kill it, alternatively you could probably use a lower level one and level all points into health) because my frog was able to knock it unconcious. I could have tamed the other one that was in the area, but it was busy knawing at my legs and I panicked.
So while you're being lovingly caressed, have your beelzebufo on neutral and both you whacking it with a bat and your frogs attacks *should* knock it out before you die. Just make sure no other sarcos or anything are in the area. (Protip: jump while mounted on your froggo and you'll dodge a kapros lunge. It'll give you enough time to at least put a tranq dart/arrow into it to get the ball rolling)