Personally in my opinion this dog should NOT be out in public spaces if he acts likes this. I'll give props for the muzzle as the OP of the videos has stated he's a bite risk many times. OP has also stated hes a washed SD because of fear aggression, BUT that doesn't excuse the fact this dog WILL bite while the handler is on the ground and not able to control the dog in this situation. OP has also stated this isnt the first time hes done this while in stores, as the OP is on the ground unconscious. Several comments have said the dog shouldn't be there or should be outside stores or at parks where the stress of being inside of a place can overwhelm the dog. I also tried to nicely educate the OP saying public spaces such as stores may not be the best option and to try empty trails or parks, in which OP gave me every excuse why she couldn't and she blocked me just as shes done to several other people who tried as well🙄🤦♀️
This dog is over threshold, very stressed and extremely terrified. If a child walked by and this dog went for a muzzle punch, this dog would still end up in the back of a animal control vehicle. I'm sorry to say it but it's true! No trainer would EVER allow a fear aggressive bite risk dog inside any store knowing this is what the outcome might be for the owner! I realize the OP claims to be a "trainer" but there is no real proof of any outside training beside her own 2 possibly 3 dogs and her friends/families dogs that she's posted about.
I would NEVER take a fear aggressive bite risk dog out in public stores. Too much room for error and training can be set back very far because of this. This needs to be done slowly in an empty park or trail. Personally I'd start and work on handler engagement and eye contact in a very low distraction environment and restart all socialization training from the very beginning than work up from there slowly. It would take a while but that's what this dog needs🤷♀️