So I think I have a chick with cocci & she is separated & I will be starting her on the meds as soon as the farm supply store opens but in the mean time, I am paranoid about all my chicks now. We have 9 chicks, some orpingtons, marans, cochins; all around 4 wks old. Normally, I put them outside in their playpen in the morning and my daughter puts them in the brooder in the afternoons. But I took them out tonight to scour the brooder and noticed that everyone had a fluid sac on their chest. I panicked. We new mommies do that. I pounced on my laptop to check BYC and......I quickly found out that is the crop. But my question (finally, right?) is this, should it feel like a like a little water ballon? Is this something associated with whatever is going on with my sick chick? It did not feel like it was full of food. It was squishy, like water.