Last night Willow's front leg looked back to normal, and the abrasion on her stifle was completely scabbed over with no remaining swelling. I free lunged her at trot for a few minutes and then walked her for twenty minutes. She also got another dose of bute. I had hoped to get back to riding tonight.
I could tell when I hooked up the side reins and pushed her into trot tonight, though, that she's still sore and/or stiff. She was perfectly even, but she just had a reluctant aura about her, and she didn't want to canter and only held the canter for a few strides. Not at all usual for Willow. So I unhooked the side reins and we're back to hand-walking and bute for a couple more days.
I would be sore, too, if I were to run as fast as I could for twenty minutes with no conditioning for cross country!