I'm have to advise against leaving the dog in the yard. We rescued a husky who was raised by a young single guy who left in the yard all day while he worked. Tika ran away so many times (jumped the fence, dug under the fence, chewed through leather leashes) that eventually the owner just gave up coming to pick him back up. When we got him, he was about 2 yrs old and very anti-social: wouldn't come in the house unless the weather was terrible, not good with kids, liked me but only me, growled at house guests and started charging the fence when neighbors would walk by. He was a lovely dog otherwise...
We had to give him back to the Humane Association after 8 months because I realized even my grown-up friends were afraid of him, and then he decided to discipline my 10 year old son as though he were a puppy (knocked him over, held him down and nipped above his neck). I felt terrible, but I just couldn't control him. Had he been properly socialized as a puppy, I think the story might have been different.