6 Month Old showing slightly aggressive Behavior
We have had our first GSD, Shiloh, since he was about 2 months. He’s now 6 months and everything has been going pretty well. In fact before the last couple of weeks we had even started to kick the mouthing problem and he was being really good! About 2 weeks ago, out of no where, he started growling at us when we came near him - specifically when he is laying down and I go to pet his head or something. He will bear his teeth and growl. We thought he was in pain or something but after a trip to the vet, that’s not the case. Then we thought he could just be bored but after all the excessive we could give him it’s not that either. We started treating it as if it were a dominance thing (not allowing him on any furniture, being assertive with “No” when he growls, all of that). Things have gotten a little better but I’m just confused?? Is this normal angsty teen GSD behavior or is something seriously wrong???
PS I should add that he is completely fine around strangers and dogs on walks. Very well socialized.