Also another thought was maybe some plain canned pumpkin. It is suggested by vets for constipation but the fibre may also help for runny poops as it does in humans with IBS. Maybe a different vet could offer more advice on that if this one hasn't. I'm wondering though if they want to test for parisites? What sort of treatment was suggested if they don't know what is causing the problem? I'd t be worried that she picked something up around the time of the move and it just coincided.
I disapprove of what you say, but I will defend to the death your right to say it. ~Voltaire