Hen died of swollen neck.

[Lazy Farmer]

X2 on impacted crop

x3

 

[featherhead007]

Howdy and welcome to Backyard Chickens.
Could have had an impacted crop? Styrofoam, possible could have caused it and chickens will eat it.

YAH, chickens will eat styrofoam! believe me, they do!

 

[featherhead007]

 

[Lazy Farmer]

Yesterday I went out to feed my chicken and found one hen with a large lump under her neck. Looks like her gizzard was swollen. This morning when I went to check on her she was dead. Does anyone know what would cause that? I saw part of a stara-form plate in the coop, could she have gotten sick from eating that? The other 5 hens seems fine. I feed them laying pellets.

Thanks,
Rosann

I just Googled "Styrofoam biodegradable period".
It takes 500 years to forever for that material to break down. And I have also learned today that it is a no no as far as exposing your poultry to the "forever product". Duly noted and thanks for sharing your experience, as sad as it was. You just might of saved other members from a similar tragedy.
Welcome to the site.