@muted As a fellow land shark owner, I commiserate with your pain. I found with mine at least that nipping and biting was the best way she found to express a desire of hers. A found that a lot of tips didn’t work out of the gate, so here’s what I’ve been doing that works:
The OUCH method needed to be a proper high-pitched squeal that took me a moment to dial-in, and needed some gusto for my pup to buy into the idea that it actually hurt.
Leaving the room or ignoring my pooch only really worked if I properly effed off and did something else. Though only if the excitement was at a level where she would listen with difficulty.
Redirection to a toy only really works for the highest levels of excitement, because my pup just needed to do literally anything to get out her excitement. The toy also needs to be very high-value. Haven’t puzzled this one out fully quite yet to be honest.
I found that exciting my dog in a controlled and measured manner, and asking for a little obedience in that state, as part of training, has done wonders. It seemed to train the ability to think while excited. It’s a work in progress because there’s only so much I can excite her with vigorous butt scritches and exuberant play, but I can see her thinking about a chomp, then think better of it.
Thanks for reading my Ted talk, and hope this helps you!