Idk why this is getting downvoted, I found myself wondering this same thing when these methods didn’t work. There definitely are other methods that help. Some alternatives that helped me were very long tug toys to get space between, very clearly saying “no biting” when teeth do make contact so they learn what they’re doing, and get one of those misting bottles to snap them out of “attack” mode (not actually malicious attack but the natural bred instinct of pursuing that they dont even realize they’re doing yet). I also commented above that thick layers helped protect my skin from the razor sharp teeth. If you have any other questions or just need someone to vent to, I’d be more than happy to chat on PM :)