It is full blown land shark mode these days. Yep, 12 + weeks old
At one point I was really, honestly getting tired of his biting and managing him despite an interesting day for DD. So, I put him in his crate to give myself a break. And what have I learned? When he goes into the zoomies/landshark mode, he is simply plain tired and needs crate time. He immediately drops "dead" and sleeps for a while.
It surely helps and once he is rested it is he sweetest pup again. Never crossed my mind until that coincidental steep learning curve.
I hope this will work with your little sharkies as well. I just decided to post this experience in case it helps some of you.