I was driving along a winding (yet still quite busy) country road, delivering Yellow Pages, when I came across a Yorkshire Terrier happily trotting down the middle of the road, in the opposite direction. He was obviously at risk of being killed by a driver encountering him as he came round a corner, so I put him on the back seat of my car and carried on driving towards the nearest village.
My canine companion wasn't at all scared and immediately jumped over the seats and sat on my knee while I was driving. (I was wondering how I was going to explain that to Pc Plod if I encountered him!).
As I came into the village the road narrowed and I had to pull over to allow a Land Rover to pass me. As it did so, I waved the driver down and asked him if he recognised the dog. He said "Oh no, not again! Everyone around here knows him. He belongs at the Old Vicarage, two miles away"
When I took him home his owners seemed grateful but they still let him play in their garden with the gate onto the road wide open! Some people, eh?!
I've also rescued a wandering dog on Folkestone sea front. He belonged to the owners of a local café, who seemed unconcerned that I'd found him half a mile away.
When I worked at a railway station we found a stunningly beautiful Siberian Husky on the platform. While we were working out what to do with him we heard an appeal for information about him on the local radio station, so we were able to reunite him with his owners.