Like a star who’s found new life in the age of the Internet, Lassie’s on the comeback trail as pitchdog and charity ambassador. And I’m among the millions who are thrilled.

As with many a boomer, I grew up with the TV series (1954-73), still in syndication, and the various movies that found their way to the tube. And, not surprisingly, I had a Lassie and later on Lassie 2.0, whom we called Sassy. (Yes, I know, lame, but I loved that dog, who was a rescue, and all the animals we had and ah!, don’t get me started.)

I also had the pleasure of interviewing Bob Weatherwax – son of dog trainer Rudd Weatherwax – whose pooch, Pal, played “Lassie” in the 1943 film “Lassie Come Home.” Bob told me fascinating stuff about how trainers use physical commands to elicit seemingly emotional responses from canine actors. He also confirmed what is one of the most intriguing aspects of Lassie...