I know how you feel,Last year i had a Border Collie land in my yard numerous times,He had a tag on so the first and second time i called the township,But the 3rd time i had his owners number memorized.

They had found the dog themselves,I think the dog must be trying to find his original owners,Has to be he takes off everyday nearly.

I had not seen him in months until he showed up at a friend of mines house,So she put posters up all over,Still nothing.

In your case he will be safe at the pound.

Problem in this area if the dog has no tags and have not been claimed in a few days the dog catcher shoots them,Id like to shoot him but.....