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Mark Olenki / AFP / Getty Images Sit. Stay. Biscuit. Ball. How many words does your dog know? Chaser, a border collie from Spartanburg, S.C., knows a whopping 1,022 nouns -- the biggest canine vocabulary ever reported. Intensive Training Chaser's linguistic feat is no accident. It's the result of thousands of hours of hard work by her owner, John W. Pilley, a retired psychologist. As the New York Times reports, after reading about Rico, a German border collie who'd been taught to recognize 200 toys by name, Pilley began a similar effort. In 2004, he adopted Chaser as a puppy and starting training her four to five hours per day. Within three years, she could identify by name 800 stuffed ...



