Can stress cause hyperactivity?
Just got back from a quick walk, it was an unusually busy morning, crowds of noisy children on the school run (this is normal, he’s been walking in crowds since 8 weeks old, I’m just adding it as a possible extra stressor) and we passed a landscape company cutting hedges and chipping tree trunks, two loud ride on lawnmowers and then passed an aggressive dog on the pavement so close range barking and lunging trying to get to mine.
My 8 month old walked past the noisy gardeners and the lawnmowers absolutely fine, he was way too wound up to pass the barking dog nicely and eat treats which isn’t surprising but then he just went completely bonkers.
So, so hyperactive!
Jumping up and lunging at and biting at my other dog so persistently I had to put him on the other side where he then pulled like a horror (he doesn’t normally pull much, if at all) as well as constantly trying to kill me by trying to dash infront of my feet to jump at my other dog.
Let him off lead in the hope that a nice run around the empty field would burn off some energy and calm him down but he never ran instead choosing to walk nicely with my other dog 
Had to put him back on lead once near pavement again as he isn’t obedient like my other one and he pulled and lunged and jumped and completely ignored my pleas and showing of treats to walk nicely whenever he saw another dog passing the whole way back...
I know he’s an adolescent but it’s very out of character for him.
He’s pretty good at walking nicely, fairly good at ignoring other dogs, he does occasionally jump up a bit at my other dog but nothing like today.
It was like walking a totally different dog and I’m just wondering if it’s possible that the stress of the crowds of people, traffic, lawnmowers, hedge trimmers, chipping machines, angry dogs etc caused him to behave in that way?
Like got him completely wound up and overstimulated or is this just the beginning of the nightmare adolescence period that posters here speak of and the busyness of this morning was just a coincidence?