How is your silkie doing? My cochin pullet got a hole on the top of her beak and I'm trying to figure out what to do for her. Were you able to get any information?
Gsweet from the angle of the photo it looks like the tip of the upper beak lines up with the hole in the bottom. Is the lower beak longer than the top? If so it may be the continual action of opening and closing it's mouth that is hammering the top point into the lower.
I've never seen that before - maybe she needs a chicken dentist.
My vet seemed to think an injury that is trying to heal itself. She said that unfortunately the beak will most likely split but there us not much she can do as acrylic patches do not hold well on these kind of beaks . The malalignment may be from the way we are holding her.