Animal cognition researcher John Pilley with Chaser, a border collie that knows the meaning of more than 1,000 words. Photos: Corbis; AFP

Does your pet care about you? Probably not. Here's why

Caroline Williams investigates just how intelligent, entertaining and empathetic our 'best friends' can be.

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Animal cognition researcher John Pilley with Chaser, a border collie that knows the meaning of more than 1,000 words. Photos: Corbis; AFP
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