Among the dogs noisily bounding to inquire after your business at Dundrum Farm, one is really something special. Gordon, a big black schnauzer, lost his sight to blastomycosis a couple of years ago, but you would never know it: he scampers confidently along corridors, through doorways, even joins the reception committee outside. "Until he gets on the grass," Lesley Campion explains. "Then he knows that he only has one stride, and has to stop. But no, he's a genius, that dog." Certainly he couldn't exhibit a more certain sense of...