My duckling just hatch. I had to help since the membrane was stuck all over him/her. I gently pilled back the shell and membrane. I never saw any blood or anything. I helped with the top half of the shell until she was able to get her head out then stopped. She got herself the rest of the way out. I went to pick her up and check on her when I saw the bottom of her belly is about the size of a pea. Just a round hole like of looks just like a kids belly botton. I have NO idea what to do? Just leave it or do I put a bandaid on it? I hope someone comes along quick because I am freaking out! ETA: Thank you everyone who answered so quickly for me. I was really scrared for a moment. I think I got enough answers to get me through this. This was my very first animal of any kind hatching so when I saw that I just freaked.