We did a lot of softening work at the trot. She's continuing to improve her ability to carry the softness for longer periods - we're pretty reliably up to 11 soft steps in each direction, without diving or curling up. I'm still keeping my hands a bit higher than I usually carry them to help her out. Soon she's be able to carry herself correctly on a continuous basis at the trot. Between sets of trot work, we would walk around on a loose rein, including over the (now invisible) pole, and around the cones that were set out. We also did some backing and some work on turn on the haunches to the left, taking one slow step at a time. She knows how to do this lateral work, but needs a refresher. And after another trot set we worked on our transitions, using the sequence of feeling the movement and the new rhythm in my body, breathing out and cuing (if needed) - she was right on it for all the upwards and downwards transitions between walk and trot and walk and halt. I rarely needed any cue at all - as soon as the thought and breath happened she did it, and not using any rein cues gave her an easier opportunity to stay soft and balanced through the transitions.
Then, since everything was working so well for us, we started our canter work. I made sure to get at least 5 soft steps at the trot before asking for canter. Her canter departure to the left was really nice, and we did one big circle before coming back to trot. To the right she was somewhat strung out - this was probably incorrect timing of the cue on my part - but once she got the canter it was lovely and round. She didn't get excited or rushy at all. After we were done, we walked around the outside of the arena past the community garden - she got a little bit rushy and looky, so we did frequent turns to keep her engaged and focussed.
I'm absolutely delighted with Dawn's progress and her willingness and work ethic. I think all the primary building blocks are in place, and we can now begin to refine lots of things.
After I gave her a rinse off and she was grazing while she dried, my younger daughter arrived, back from her road trip. Dawn is now hers again for the time she's here and I'm sure they'll enjoy their time on the trail together. Maisie's suspensory swelling is looking better every day, but she's not ready to ride yet.