Border Collie Trained to Recognize 1,022 Nouns Dies - The New York Times
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Chaser the 'world's smartest dog' dies at age 15
World's Smartest Dog' Chaser the Border Collie Dead at 15
What are the unique qualities of the Border Collie dog breed? - Quora
Some dogs are geniuses—just like humans
Chaser, the border collie that could recognize more than 1,000 words, has died
Sit. Stay. Parse. Good girl!, Local&State
Chaser, the world's cleverest dog, has died after learning 1,022 words
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