I think… I think part of the issue with her not striding out is her fitness. Her sprinting is just sooooo baddddd. I went to the park with all three of them and threw the ball and seriously after 2 goes she’d had enough and bloody Mallei was beating her!!!! That never happens. But this is very ok. This is easy-peasy to fix. Hill running – easy, sprinting at the park for a ball – easy, going to the dog-park and being chased – easy (and good for Loki, too)(not the being chased part, but meeting all the other dogs).
So… with more and more sprinting, and continuing to train consistently (that being the key word here!), I suspect it won’t be long at all until any residual weirdness and short-striding goes away.