Removing the Fathier chase and trimming it here and there is the most I think could be done without it feeling confusing, but I think I would need to see the concept tested to see if that would even be worth it.
Maybe we could cut to another scene after the stable scene, and then when we cut back to Finn and Rose we see the very end of the chase (when they split off from the other creatures through the field and then are picked up by DJ and BB-8. I think that would work, cutting out the long chase scene but still providing setup and still addressing the animal ‘theme’ properly.