Help! GSD is growling at male visitors
Quick background: Military flunked him for "no work drive." They told us he's "not aggressive at all." Wasn't even potty trained when we got him in May. He's 2 years old.
All of a sudden he's growling at male visitors. One guy was a maintenance man who 6'4 or 6'5 and I thought that since the guy was so tall that that was why our dog acted slightly growly.
Then tonight a man came over who is about 5'7 or 5'8 (my height) and he growled at him too.
We have kids and their friends come over a lot -- and the moms pick up the kids. No growling at the moms or kids. Just the dads. (And I'm pretty certain the military guys were kind to him; he initially was glued to my husband.)
My thought is to put a treat on the front porch and ask the visitors to pick up a treat and hand it to our dog as they're coming inside.
Good idea? Bad idea? I just thought that might help my dog understand that visitors are good.
HOWEVER. . . my husband travels and I'd love for my dog to growl if the wrong sort of person shows up. So now what?!
Would love any and all ideas!