Shares the story of a Border Collie who recognized an unprecedented number of human words to explore her role in advancing understandings about animal intelligence, recounting how she also demonstrated an ability to use deductive reasoning and imitation.

"With a new afterword"--Cover. Includes index.

The dog who knows a thousand words -- Good-bye -- Christmas in June -- Let the puppy be a puppy -- "You've got to name her Chaser!" -- Chaser learns what not to chase -- Listening to the farmer -- Learning by playing -- Herding words -- Herding sheep -- Advanced lessons -- Getting published -- Going viral -- Chaser takes a bow -- Chaser goes to Washington -- Expanding the conversation -- Epilogue -- Afterword -- Appendix. Chaser's toys.