I have almost 3 acres of land, and my Lab has availability to about 2 acres of it. Our grass is mowed, wet on occassion from rain, but not daily, why would he after a year of living here, choose now to deficate on the driveway? Not in the same place either. The only thing I can think of, is maybe he got stung, but he squats to urniate...and he does that in the grass. Any thoughts?