Our ducklings are 7 days old. From the very first day we had them, one had a mark on its bill. It was definitely noticeable but kind of hard to get a good look at. Now that they are bigger and I can see it, it looks like a gouge? Her bill isn't as big as the others either now that they are growing. It also appears the bottom is growing faster than the top as it sticks out a bit. She eats and drinks ok...not able to pick up 'treats' as well though. And not a big fan of her head under water like the other two. She also makes a chatter kid of noise...like she is mouth breathing. Its not labored but her mouth is open alot of the time. This pic is hard to see... the spot is still there but almost looks like a scab type thing is lifting up and will fall off leaving and indent in her bill underneath. Any thoughts?