This bellybutton does not look normal, right? I noticed it when I was cleaning pasty butt from this (then) 2 day old chick. I found this chick dead the next morning. I always thought the best course of action for belly buttons was to leave them alone and keep the brooder clean (which it was... it was only on its second day!). I avoided the bellybutton to the best of my ability while cleaning off the pasty butt. I'm not sure if it is visible in the picture, but it looked like something 'granular' inside the belly button.
Anyway, wondering if I should notify the hatchery, but I'm having a hard time determining what exactly was going on here.