Cant figure out what's wrong.

[Natmaster]

Oh im so sorry. The same thing happened to my chick this morning and she died this afternoon
this is happening to ALOT of people and killing alot of chickens. I really want to know whats causing this

 

[Mojoe37]

labs... $165.00 we did not have Agnes because of this expense..... the rest of the flock seems fine so far. still wish we knew what had happened.