This is ridiculous. Now he's walking all over the place. He's having a slightly easier time getting up by himself, and he's actually getting up and walking from room to room now. I got home today from being gone all day, and he got up from where he was lying down in front of the couch and walked all the way over to me just like he always used to do. It was like nothing was wrong. And he stood there, on his own, while I petted him. And then he walked a few more steps to drink some water, standing up.
I knew it would start happening, I just didn't think it would be this soon, or that it would be so much at once. He still has problems getting up, but it looks like he has the walking thing pretty much down now. And he can stand without falling over seemingly for however long he wants.
It can only get better from here, and it's already pretty good. He walked from one side of the house to the other just to lie down next to me. It almost makes everything we've gone through worth it.