Plenty of surmise there, Doug. I've never had a dog and I walk and walk and walk. You appear to imply that dog owners wouldn't walk if they didn't have their dogs. In contrast, the dogshit bins cost demonstrable hard cash and the people who empty them receive demonstrable wages, paid for by taxpayers. And the reason you don't seem to see many cat owners out there fighting the obesity crisis is that their cats are at home while they're out walking.