I think that our move to a much bigger plot of land will make the most difference to Hachi. We'll be able to take him and Shyla for off-leash walks every day through peaceful meadows and forest. Hachi will be able to run in circles around us as much as he wants to.
I think that being able to play with Shyla outdoors every day will make Hachi an even happier dog. I've come to strongly believe in the power of play for dogs with serious fears. Since we humans started playing with him daily, he has become so much more light-hearted than he ever was before. He wakes up playful, "ambushing" us to ask for play first thing in the morning. Just recently, he's started doing the same thing around mid-afternoon. It's incredible to feel the change in him.
Happy Hachi Day.