Time and PATIENCE, imo there is no one technique that will work with every pup. For instance yelping/screaming when my pup bit just made him come at me harder. When he bit a quick nope, looking away then playing tug worked after some time. I also agree with not touching his muzzle, your vet is a VET not a trainer. Do not spray anything into its mouth when it bites. Find a technique stick with it and as so many have said, patience and time.

My arms looked like I was a intravenous methamphetamine user, small bruises and little cuts from when the teeth punctured the skin. Good luck.

Getting my pup physically tired helped. He was doing mile walks at 10 wks. Perhaps not recommended for a larger dog, but we needed it. Outside was a place I didn't have to correct him, and he had to think to stay with me.

Also LOTS of marker training. Sit, down, the beginnings of heel. We didn't do much leash work as the leash was always something he would bite.

Well folks, Im am constantly amazed by the breed. To reassure some, I usually yelp and or shove my finger down the pups through or just hold the lower jaw. It's always worked for me with other pups. It also works for this one, I just need to be more PATIENT as some have suggested. I am comparing a show line pup to a working line pup. Levi calmed almost instantly, Drogo needs more time but he is doing much better since this post. To add to this, I have been in the hospital the last 3 days for emergency gallbladder surgery, I was very concerned Drogo would be jumping and going crazy all over me. He has been a jewel, very tender and only mouthing me, not biting, it's almost as if he senses something is wrong. I need to trust my instincts and all the things I learned from this site and videos the first time around with Levi. I just have to put a tad bit more time into Drogo than I did Levi. I really think Drogo is going to be an amazing dog. As for the question as to what my intentions are for the pup, Im somewhat limited. I have enrolled him in a puppy foundation for agility starting the end of April. I have considered Sch, which is what I did with Levi, however, the options in my area are limited. Those that I trained with for Levi have moved the club considerably far from me and I am not aware of or would trust just any with this pup as he has all the making for a great sport dog, maybe even protection although I dont feel that protection is needed, I believe he will have it in him quite readily. Obedience, tracking, agility and whatever else I can do with him that will keep him happy and fit. I am always open to suggestions as well!

 Quote: Tracy Collins

I haven't tried that. But I'd be concerned about any technique that would make the dog distrustful of the owner putting hands in the dog's mouth. It's important IMO for the dog to allow you to put your hands in his mouth for administering pills, brushing teeth, retrieving a foreign objects, etc.

I think bitter spray is best used when it can be sprayed on an object to make it unappealing to chew on--a door frame, table leg, or bandage. Then the dog associates the negative with the forbidden object--not you.

I was thinking that might come up.
I know a breeder who trained all 30 plus of her dogs and the pups with bitter spray in mouth when mouthing. Her dogs don't mind being touched around mouth ECT. Weird.
Ill have to ask her how she does it.

I've done a number of dogs over the yrs with the finger in the mouth and I've never had an issue with it. That includes my Schutzhund III GSD as a pup. I've also done it with a number of hunt terriers. Those could be fun. LOL!
I've also seen a number of dogs that had no aversion to Bitter apple and would happily lick it off anything it was put on.
I've not tried it but the method I've "heard" works with the BA is to soak a piece of cotton on it, stick it in the dogs mouth and hold it shut for 10 -15 seconds. That will create an aversion.

I've "heard" about the bitter-apple-soaked cotton ball, too.

And I totally agree with Tracy that "I'd be concerned about any technique that would make the dog distrustful of the owner putting hands in the dog's mouth. It's important IMO for the dog to allow you to put your hands in his mouth for administering pills, brushing teeth, retrieving a foreign objects, etc."

Creating that kind of aversive sounds like a great way to completely undo all training to accept hand-on-face "procedures," from eye drops to wound-cleaning to oral exams to ear-handling and more.