
I think it is a bit of a silly idea, but I'd much rather that than owners who leave their dog at home for hours and hours, and it doesn't seem to me like many of the dogs are uncomfortable, there's no wriggling or stress panting etc. The dogs are spending an hour or so with their owner and the owners are getting some exercise too.
Actual benefits, I'd say are probably very few, but I don't see it as detrimental in any way :/