Speaking as an avid dog-walking fan, this is devastating. Big loss for the dog-walking community.
I moved to NY last week. Once he started talking how he was a dog walker I was thinking how I could have hired him to run my dogs. That would have bumped the 40mph to 100.
There's a place in the city that hires runners to run with high energy dogs. I considered it but they don't pay enough. Might be good to amass clients or get your foot in the door.