I own an e-collar for my GSD/Mal mix and he ALWAYS has it on when he's doing off leash training. I can't remember using the stim on it in the last month. It's a precautionary thing. I also see that these dogs are pushy once you've sweetened them to death with all reward training. Like kids/teens/young adults, they need balance, and their needs tend to vary from dog-to-dog, not necessarily just breed.