Interesting. My young GS (13-14 wk) did a tiny bit of training with a bite rag, this week, yesterday, I was watering, he went absolutely insane on the stream of water, stalking it, running after it, biting, snapping at it, got completely soaked! He was so excited he’d make the funniest frustrated yelps (and barking) as he was going after it. He’s a show line type, but from Argentina and Hungarian lines, I think he may actually have the genes for this. Time will tell..