Hi, Hoping for some help/reassurance. Most of the time my 6 month lab pup is great but sometimes he flips a switch and turns into a monster when he gets over threshold. Issue is there doesn’t seem to be any real trigger to this. In the house it is fairly manageable - I can put him in another room and give him a timeout. On a walk not so much. I say no trigger but quite often it’s off lead - 90% of the time he is great and then out of no where it seems he will start jumping up and biting at me frantically like a maniac. Sometimes I can calm him down and get him to sit but sometimes it’s like he’s not even there behind his eyes! Any tips? Is this normal behaviour? thank you!