Lately, I see dogs on treadmills, and I don't mean in my dreams or metaphorically. Folks are seriously opting for machines, particularly, it seems, for basset hounds. The word is that since exercise is good for dogs, this can’t be bad. Better than nothing, maybe, but you have to think that Clementine, Skully and Hank (below), would be much happier wandering at their own varied pace out where squirrels chirp on branches and honest-to-goodness urine wafts from every hydrant, mailbox and tree. Even the Jetsons’ treadmill was out on the space-deck and included a thrilling cat chase.