What the heck did my chicken poop out?

[railbuggy89]

This is the second day in a row that I have found this in my coop of 5 month old hens that have yet to begin laying. They had bloody poop about a week ago. No parasites found in their fecal test. I've been treating them with amprolium since Wednesday in their water in case they have coccidia.

 

[railbuggy89]

This is after I cut it open.

 

[holm25]

yikes

 

[WindStep]

That's That's Weird!

 

[railbuggy89]

I've sent the photos to my veterinarian and my chickens seem otherwise healthy. Btw their stool seems to be improving.