Collie Smile

My boy,nearly 13,has been with Paul and I since the very beginning of our relationship,he isn't normally a cuddly dog,but has been following me around everywhere over the past couple of weeks,several trips to the vets but we are getting worse not better,his back legs are all over the place today and tomorrow we visit a specialist MRI scanner is booked.....hope? Or the end? It has to be the former,I'm not quite ready to lose my best friend yet.