Here's what I do for found dogs:
1. Ad in the local newspaper for 5 days (yes, "old school" classified ads--older people are more likely to see them than online ads, and they count as "legal" notice of a found dog most places). Many newspapers run found dog ads free of charge.
2. Post on Craigslist & the "Lost Pets of (your town/county/parish)" Facebook page (for the young 'uns who no longer read the newspaper).
3. Flyers in the neighborhood--color copies with a photo of the dog, posted all over the neighborhood, esp. at intersections, in rural areas at mailbox pods, and in local businesses (including vet offices, as they may know the dog). If rain is coming, you can put them in plastic page sleeves (opening down, stapled across the bottom, so rain doesn't go in). (If people are still in shelters after the storm, be sure flyers get to the shelters too, as the owners could have been displaced by the storm.)
4. Take the dog out walking when people are out in the neighborhood after work, and on weekends, and talk to everyone: "Have you ever seen this dog in the neighborhood? Have you seen anyone looking for a lost dog?"
5. Notice to the local shelter with a photo, in case the owner looks there. If it's a good no-kill shelter, I'd even consider leaving the dog there for the statutory hold period, with notice that you will adopt it if the owner doesn't come -- that gets you a "clean" title of ownership to the dog in most places, so it's really "your" dog.
Doing all of the above has resulted in me getting most the dogs I've found home, and I'm someone who stops for loose dogs. If someone's looking, they'll see one of these forms of notice.
I would definitely check with your local Animal Control agency about what your responsibilities are for finding the owner. It varies by location. Some places have no requirements, others require newspaper ads, and a few require the dog to be brought to the shelter.
Last edited by Magwart; 10-09-2017 at 10:42 AM.