They're older and slower, but just because the arthritis is kicking in, that doesn't mean they can't have fun with a group of buddies. No, it's not an ad for a retirement village, it's the ethos of Wellington professional dog-walker, Justin Meade. The pooch-obssessed pack-walker has just started a new dog-walking service, one-day-a-week, for senior dogs. Mary Argue tagged along.