An Update on Yggdrasil
So not much has changed, we've been starting to do more bodywork on him to help him with his hind leg and other issues. He doesn't seem neurologic anymore to us, but it seems to be mechanical and might be an old injury this whole time (since before we bought him, no injuries were disclosed).
Still doing just groundwork but have been starting to teach him ground driving which he finally seem to be okay with and he's learning quite quickly. You really see how his movement is off (he's not lame) when you're walking behind him. Just wanted to give a little update on him here. Check out my YouTube channel for videos about Yggdrasil, art and gaming. I don't currently have any ground driving videos listed though.

He's starting to do so good with this. I can still only work him for maybe 10-15 min on this before he gets too sore. Think more like ten minutes if I ask him to load his hind once or twice. This is only done at a walk.
It's taken a long time to get him to be okay with someone walking behind him like this. He's new to ground driving. It's a good way to get him to start to engage his back and strengthen that leg. Plus it kinda gives him a job if that makes sense.