Don't know if you tried this but perhaps frequent short rides might be helpful. There is also a product called Composure Treats that were recommened for stress so perhaps something like this might also be an idea. They are all natural. I can either get them at the vets office or on line. My girls love them.
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"I do not at all understand the mystery of grace-only that it meets us where we are but does not leave us where it found us"-Anne Lamott |