I don't know if it is common but Sophie has one. I think it is the cutest thing. You can always see her little teeth and it looks like she is smiling. Her's is pretty bad but the vet said it doesn't seem to effect her eating or movement of her jaw. I have to show you a pic. First one is recent and the second one is a baby pic that you can kinda tell in. I would love to see pics of your babies underbites.
__________________ Tanya & Sophie |