I am curious, my pup has what we call a muzzle line on his snout. It looks like a line a dog “gentle lead” or muzzle would leave after being worn for a bit. However I got him at 13 weeks by a breeder where he and his litter mates were and he has a fabulous pedigree, and there’s been no use of that type of lead. This wasn’t present then at the time we got him but as he grows there is this line over his snout. It looks like we use a muzzle on him. Here’s a pic may be hard to see. You can see it in some light but not as well in others. I’ll check with the vet what it could be. Maybe just how his fur is growing? So odd. LOL he’s adorable no matter but I’m curious some thoughts. (Just zoom in) Thanks !!!