Well you know how vicious Blue Heelers can be. From other Blue Heeler owners i've talked to, it sounds a lot of them won't even let strangers on the property. I was just kind of hoping he wouldn't be like that since he was submissive. He already does bark, and even growl on a few occasions. He seems much more protective of the bark yard. One thing i'm worried about, our golf course walks right out to a country club and in the summer there are golfers and CARTS driving by everyday all day. This is the primary reason I wanted to know if he was going to be protective of the property because I don't want him going out after a golfer or golf cart.