CW, I would vote for Saturdays, as in the winter the evenings are shorter and you can enjoy more scenery, possibly, during the daytime rides!
With Grace, how deep/long is the wound on her hip? I have seen amazing things on this forum from Manuka Honey and I personally am a huge fan of Vetericyn in speeding up healing. Good old Omega 3's in supplements (if you're not already) will help with inflammation. MSM will, too, and helps with joint pain as a result - don't know if it's prohibited in your show rules, though, as I don't show. I'm sending healing vibes your way...and you already know that a good massage helps with all-body health. Love the hubby's phrase, horse rubby class -- too cute!