These things are just very hard to tame. You need FREAKING cake to tame this, similar to an Achatina. Also similar to an Achatina, as a resource factory, as pelt. Fun fact: they have the Minecraft sheep noise!
The frist time I saw mine, I was on the edge of the redwood forest near a small stream. I picked it up with my Argent, so if you want to take it home and save it for breeding or tame meat that's the way too go.