Yesterday we took Abbey in to our vet to discuss the behaviors we've noticed the past few months--all of which match the symptoms of SM. As I feared, her exam came up normal and we're now being referred to the University of Minnesota for a possible MRI. Our vet wasn't aware of SM, and was very interested in the articles I brought in (thanks to Karlin and the rest of this board). She's asked to see Abbey again after her MRI, which is great to have her so receptive and supportive of something she was unaware of.
We'll be getting a call within the next few days to set up an appointment and we'll go from there.