Border Collie: Temperament, Lifespan, Grooming, Training | Petplan
The Best Exercises and Activities for Your Border Collie – PetsTEK
Old Dogs, New Research and the Secrets of Aging - The New York Times
Border Collies Guide: The Complete Owner's guide from puppy to old age; Learn how to choose, care, groom, train, exercises, health and tips (Paperback) | The Golden Notebook