In my old neighborhood, there was a guy who used to walk his lovely French Poodle, Louis, at least twice a day. Then he started walking his neighbor's Dashund, Elle, at least once between Loius' walks. Then they had to put their beloved Loius down. Happily, he now walks Elle at least twice daily. She's his over the fence neighbor. So sweet. Funny that he never, ever walked them together.
So sad that you lost your dogs. So nice that you want to reach out and walk someone else's dogs, as my neighbor does, instead of retreating into your sorrow.