I KNOW WHAT KILLED THE CHICK!!!!
It was not a chicken it was a SKUNK.
Today I walk into the coop thinking it was my black and white wether goat almost picked it up but then realize it not a goat.
So I get all the chickens out of the coop and it start to do this hissing noise almost!
Luckily I got it out of the coop yelling SATAN BE GONE it a broom.
I feel bad I don't know how it got in because this was a different time and everything was closed.
Could that would have been what ate the chick possibly? My daughter said she was sure she closed it but doesn't remember.