More than likely the dog barked because it couldn't get to you...seen it before...
I lost my best dog for over 3 weeks...changed sweaty shirts every 3 or 4 days and I traveled 40-50 miles every day...one day the shirt was moved and something had slepted on it...gave me hope and I found a week or so later...
The best part is the place I was hunting is an army base. I left notes on the equipment they are using to clear fire lanes. I left my number with the base police at the check in station I sure hope I find him.
