My Fiance found this guy running down the highway a few months ago he was in pretty rough shape. After spending lots of time trying to find his owner unsuccessfully, we'd just adopted him. Several neighbors have said they saw him eating dead animals along the road even a month before we found him.
After talking with other neighbors we found out he'd been given to a person who lives very close to us by friends that were moving and couldn't take him.
The person was a younger guy and not very responsible and would walk him with no leash. When he'd run off and not come back the guy would just go home leaving him to wander along the river and highway we live next to.
The neighbors had found him several times and asked the kid to take him back and he didn't just leaving him to fend for himself. We think he knew all along that we had the dog but didn't want take responsibility for him. He has even seen us with the dog and acted like he didn't recognize us or the dog. We didn't find out he had been the owner until the dog had been with us over 2 months.
He had dermatitis and his hair was matted so bad we had to completely shave him. He's also been on a healthy dose of wormers and good food due to his roadkill diet and he was very skittish scared of anyone raising a hand or their voice around him.
But the good news is he has the best most caring personality ever. He is also very good in the house with only a couple minor accidents in the time we've had him. He gets along good with our 2 shepherds and is already fixed. Hopefully he can learn some commands and learn to be a trusting dog again.