Are robot pets the future of elder care? I’ve been fostering a puppy during the lockdown, and he’s quite a character. He has boundless energy and is forever exploring the apartment — over and over again. He barks at things randomly, like the Merriam-Webster Dictionary on the bookshelf. And the kitchen sink. He loves being petted. Sit him on your lap and stroke his back, and his eyes will shut in bliss, he’ll wag his tail and wave his paws in the air and jiggle his head. He’s an attention hog, too. Watch TV, and he starts marching around the...