He followed me home, can I keep him?

This was after the crappiest day at work I've had in a long time.  Tired, unbelievably crappy software (which I'd rant and rave about, but I'd probably get fired), got on people's nerves, got depressed.  So left at 3:30 and walked home with Tony.

A couple of k's from home, this dog came up to us, and ended up hovering around us as we walked to rest of the way to Tony's place.  No collar (although evidence of one) and just running all over the place, including the road :(  When we got to Tony's place we got him through the gate - but he just jumped right out!!  But got him back in again and Tony kept him entertained so he stayed.  I continued on home.  Good news is, the owner found him cause Tony posted some details online.  Apparently the owners had taken off the collar that morning because he had a bit of a rash, but he jumps fences - doh!