Christina Hunger taught her dog, Stella, to communicate via buttons. It's become a global movement. Her new book has techniques to replicate at home.

It involves using word association and a set of brightly colored voice buttons to help your dog communicate and ask for what they need in a fun, interactive way.

SAN DIEGO — If you’ve ever wished your dog could tell you exactly what they want instead of barking at the door, science has good news. A groundbreaking study analyzing over 260,000 button ...