Chasing the Low Hum

A steady, rhythmic whir drew me straight toward the edge of the living room rug. A small robotic vacuum was trundling right along the baseboard! I bounded forward and matched its pace step for step. Every time it bumped the sofa skirt and spun around, I swung right in front of its plastic bumper. Tap! My front paw gave it a solid test. It beeped, pivoted sharply away, and I trotted right beside it, keeping close patrol until it rolled into its docking station.