I have just come across this post, I am sorry i have no answers for you i don't kow much about chickens sorry,

Keep us posted if you find out what it was

__________________
Pets:
5 rats: Jessica, Holly, Rose and Bud, Smudge.
2 cats: Authur Pendragon and Alvin
5 guinea pigs; Berti, Fred, Charlie,Hodge, Jaffa