My chicken hatched eggs... one died, one is sick and the last one is perfectly healthy... what do I do?

[ChocolateWingTheRooster]

One of my hens, Plucky, had hatched eggs! My dad figured this out when he saw her sitting strangely on the barn floor. However, when I had gotten there, there was a chick dead. The remaining chicks seemed fine at a glance, but when I looked at the smaller chick, I knew something was up. It wasn’t eating, and it had poop all over its butt. Anyone know what’s up?

The mom and her healthy chick. I will have to get pictures tomorrow of the sick one...

 

[CluckerFamily]

I'm thinking they weren't healthy chicks. The hen could've know they weren't healthy either. I always let mother nature surprise me with hatches but I do always feel bad for the ones that don't make it.