I'd love to see pictures. That's Hairy Dog's general mix of breeds, though with Cattle Dog as the primary part rather than GSD, I imagine he looks different.
See post # 20289 So I splurged and did Embark Genetic testing for Ori AKA Harold DogDog AKA Hairy Dog AKA HDD.
THE GREAT REVEAL
Australian Cattle Dog 62.1 %
German Shepherd 16.3 %
The rest is "Supermutt"
Likely contributing breeds
They show pure Cattle Dog on one side, and German Shepherd, a little Cattle dog and Mixed Breed on the other.
He's 70 pounds, about 24" at the shoulder, hairy (coarse and wiry), and sheds a LOT, mostly guard hairs, not so much undercoat (he actually doesn't have much undercoat) for some reason.
He's a pretty decent dog, quite good actually, though not dobe-like...whoever had him first did a good job of squelching the "how to be obnoxious in the house" instinct.
Except for the mouthing, which is a BIG TIME
problem. He crunches down, hard...and I have delicate skin (almost on a bleeding disorder level). We were told that the reason he was turned into the shelter was that he fought with their other dog. He did have tooth punctures on his back and neck, so it looks like they really did have a problem keeping their dogs civil with each other--but I've seen NO dog aggression from him since then. I'm thinking his mouth was a big part of why he was surrendered. Not a beginner's dog at all, solely for that reason.
So if you see any sign of that, help them figure out how to deal with that early (immediately). Once they get past puppyhood, my experience is that it's really a tough behavior to extinguish. Right now, it has settled down to just an over-excitement thing, but how do you keep a dog doing agility from getting excited??