A slightly alternative approach to the same issue is present in the question - Ever Seen a Fat Fox? That is the question posed by Michael Gibney in his book of the same name. When I heard the author, ask the same question, while being interviewed on radio I replied "No, but I've seen plenty of fat dogs". Apparently, our dog fits into this category. Our neighbour has suggested that our dog has recently put on a few pounds. The vet agreed and suggested the dog get less food and possibly more exercise. I have little doubt that less food approach will be more successful than the more exercise approach.
The dog is seven years of age. As those seven years progressed, I walked the dog with different combinations of my children. Strictly speaking the dog belongs to my older son. He convinced his mother to get him a dog after he underwent an operation. At the time, he would occasionally accompany the dog and myself on the walks. After this his younger sister and brother were next up. But as each passed the age of 10 they tended to leave the walking to dad and they would only make the occasional guest appearance. Over the last year or so it has just been me and the dog.
In recent weeks this has changed. A combination of the vet's advice and the advent of Pokémon GO has resulted in the children walking the dog. Apparently one has to walk to hatch the Pokémon eggs. On a personal level, I'm delighted with this development. In terms of the bigger societal picture, it is also good news as anything that encourages exercise is to be welcomed. But it would be a mistake to believe that this will result in long term behavioural changes in anything but a tiny minority of people. It is only wishful thinking to believe that fads like this will contribute significantly to combatting obesity. At best it will make a tiny contribution at the margin. Exercise has a role to play in dealing with obesity but a secondary role. The first piece of exercise should be to push away the table!