Just some observations.
I have seen dogs starving and it is not a pretty sight, we had one wander onto our property that was literally on his last leg and could no longer eat. He was obviously diseased and old; sometimes a quick death is a kindness.
You do no one any good by chasing a stray dog off, you may find it comforting to hope or believe he will be OK and you really don't want to face the tough decision of what to do. In all likelihood, he will just be chased from one place to the other until he can no longer go and die a cruel death in some field or road ditch somewhere. Some can be saved and some can't.
Many of us don't have the luxury of animal control and with the crime rate being what it is and budget cuts, local Sheriff's Departments aren't going to be able to help even if they want to.
Country living is great, but one of the down sides is that just sometimes you just have to suck it up and handle your problems on your own. Not everyone belongs in the country; country living is about more than location.
I guess each person has to decide how best to handle their own situation.