Single best way to show a dog who is the "alpha". I have seen mother dogs grab the snout of a willful pup in her mouth. The pup calms down very quickly. I have done this to many of our dogs. They submit and it does not involve spanking, shocking etc... The dog is uncomfortable, but not in pain.
Yeah I've handled even Nanny goats in a manner some would call cruel. I'd grab the lead Nanny by the horns and hold her head to the ground till she bleated. I never got butted from behind neither LOL.
The dog in that picture isn't stressed. I know Labs I've had about a half dozen or more in my life. I saved the picture to my computer so I could do a closer look at how the taping was done. It could have been off the dog in seconds.
It seemed to be done as a prank and had it shown up on the music channels under stupid trick shows etc people would have yucked it up. THe person used used duct tape {the wrinkles say as much} and had a folded flap so the end of the tape to get it off fast could be found. No Paw marks on the snout shows the dog wasn't in a panic. The dog is calm. A lot calmer than a bunch of FB viewers LOL.