A dog owner thought her black Labrador retriever had mastered a basic command—until she had a sudden realization that left social-media viewers amused.

I confess I’m not an early riser. I only got up at 5 a.m. to let the old dog out for a minute, but while outside I paused to enjoy ...

Dogs are situational, after all. They learn through repetition. If the rules change every day, you create gray areas. Gray areas create uncertainty. Uncertainty creates problems. A trainer can build a ...