How would the humane society know who's dog it is and how many people actually deal with their local shelter?
Most people I know would go in to the humane society/shelter because of the dog catcher. When I lost a dog a few years ago, I went to the shelter every day for about 2 months. We also have a hotline we can call every day to see what the day's catch was, including people who call in to say that they're holding a dog. I searched through the reports of missing dogs there, and there is nothing which fits her description.
None of your attempts would have reached me if it were my dog. Although if it were my dog I'd have plastered the freaking town and every neighboring town with flyers offering a reward and run an ad in the newspaper despite the fact I don't get one along with talking to everyone from neighbors to vets to the shelter 2 towns over and posting across the internet.
This is where you are wrong. You said that you would put an ad in the newspaper (which I have checked every day). There are definitely no ads for a lost dog of her description. I stop and look at EVERY lost dog flyer I see around town. I took her around the neighborhood to see if anyone had seen her before. No leads at all.
I would suggest making some quick flyers and printing them out. Drop one at each vet and maybe the feed store or similar. Some local grocery stores will let you put them up too. First get the poor thing checked for a micro chip. It may have slipped it's collar or run off right after bath time but has a chip. There are also a few people who think if they microchip they don't need ID on their dog.... That only works if someone first checks for a chip, second the chip is found, and third they have the type of reader to get the info off the chip. That's why mine always have tags on. Just because someone doesn't see your ads doesn't mean they aren't missing their dog and she isn't missing them. I'd know within minutes that my dog was gone (still doesn't mean I can catch her before she disapears) but I would not have seen any of your ads. I also don't use a local vet. I dislike the vet in town and the town 10mins away. I prefer a vet that's a 30mins drive. The local vet wouldn't recognize my dog at all and I rarely go in their office
After my last experience with returning a lost dog, I would rather not knock on someone's door to return a dog. I especially don't want to take a dog that I like to a completely unknown situation. I will check her for a microchip before I completely claim her, but I don't have a lot of respect for someone who appears to have made no effort to find her.
As far as flyers go, if I didn't like this dog or had no interest in keeping her, I would be plastering them everywhere. I could drop off a flyer at every vet in town, but if they only want their dog back badly enough to go to one vet's office, they don't want her back enough. As it stands, I could care less if I find her owner, I'd be thrilled to keep her.
The owners don't appear to be missing her because they have made zero effort to find her. No flyers, no ads, nothing that I can see. She doesn't seem to be missing them. She's eating well, loving going for rides in the truck with my dogs and doesn't seem the least bit depressed or despondant.
There is a large population of college students in this town. My best guess is that one of them couldn't move with her, so they took her out in the country and dumped her. It happens more than I'd like to admit here.