What is gentle leader? I don't see cuts anywhere on the dog.
Guardian Gear Head Collar for Dogs | PetFoodDirect
It should be on like the dog in this photo , the fur on it nose is laying flat ,
the one is the story is digging into the dog nose.
The one I posted is called a guardian-gear-head-collar but it's the same thing as a gentle leader ,difference companies call it difference names.
"Hold the Guardian Gear Head Collar for Dogs by the noseband, the Guardian Gear Head Collar for Dogs will assume the shape of the dog’s head, with the two rings under the chin
The collar section is adjustable using the slide. When the buckle is securely closed it should accurately fit the dog’s neck (a two-finger slackness is the best guide)
Double check where the noseband is naturally sitting. It should be down the nose and away from the eyes
Release pressure on the chain strap. The dog should be able to fully open his/her mouth without restriction "
You should be able to put 2 fingers under it , there is no room to do that on the dog in the story.