Thank you for trying to help out this poor baby.

I think you did more than most people would--I can understand you not wanting to bring the dog to your yard--I found 2 strays a couple of weeks ago, and rather than letting them in our yard, I sat out front with them on leashes until someone came to pick them up--why? Because I had no idea how they were, or if they had any diseases or anything that could be spread to my dogs. Both of them got home, and that was end of story.

Maybe if you see this dog again, you could check for tags and call the owner. If it has no tags, maybe you should call animal control or a vet to check it out.