Fin is doing great! He has had one set back but he has continued to gain strength, both sides have symmetrical muscle (size, tonicity, range of motion), and both of his hind legs are a bit weak. This past week or so we have been going on longer walks which are mostly flat. We have also been allowing him to run in the yard by himself, so he can stop when he feels it is too much. And when he tries to chase his sister around the yard, we are there to stop this silliness, at least for the time being.
This week we are going to be working on hills! A hill a day, and in our area we really only have one hill to climb, but it has a few route up and down (steep and gradual).
Massage and stretching continues and we are working on keeping his hamstrings loose and happy. And all of the muscles in his hind legs well stretched and ready to work properly.