Okay, I managed to work it out. Apparently he DID somewhere get down all the ramps, but could not find his way back up. Had to Mine some stairs up for him.
On another note, I built the Nature Shrine, and I'm rather puzzled. I have just over 1000 relationship with Nature, and I tried out the 'Recruit Wild Animals' reaction, but to no pomp or circumstance. Should there be any notices, or something obvious happen? I'm getting nothing. Also Haven't the foggiest how the Make an Offering reaction is supposed to work.
Edit: Yeah, After about an hour of trying to sift through the Raws and trying to find the reaction, I still have not a damned Clue what or how LUA_HOOK_DRUID_TAME_ANIMAL_GNOME, or the LUA_HOOK_DRUID_TAME_ANIMAL_GNOME reactions work. Then again, doing all this at 5AM after an all nighter is probably not the best of ideas I've had.