As noted in my previous post, Lexi had significantly slowed on her contacts in an attempt to do it correctly.
After a couple weeks of working with Stuart's double target method, we're seeing marked improvement. Her dogwalk speed has doubled! She's now running the dogwalk in around 2.5 seconds (sometimes as low as 2.1!) Previously, it was over 4 seconds.
Here's a video from a week ago that shows her improvement: