Ok, so, this is a taming pen problem. Another bug for the dev team to not address. @Nordist I'm a returning player. Before I left I had a 56 w/ most power stones and about 6 elephants. After my return I had zero characters with zero power stones and zero tames, ships, levels, points, gear, etc. I had to start from scratch again. But this time it's a million times harder. Less people playing on the "lawless" maps, which is indicative of the low population. I love that I can finally get some descent buildable land now. But I hate there's noone to play with. They messed up the land grab so bad at launch.
So to answer your questions, yes. I have tamed them before and remember their sweet spot. I grow my own wheat. This has something to do with the building blocks that we make taming pens out of. It's bugged. I even lost a corpse w/ all my taming stuff and gear in them (right after posting this last night).
Oh duh. I should add that I was able to tame using the billboard method (something new to me). Somehow the billboards eliminate what's causing tames not to eat from you. I still didn't tame an elephant tho. I need med kits unlocked. They woop my ass, even knowing the sweet spot. I did get one to around 55% last night tho (billboard method) (live servers).