There is very little information about lashes. I think if it was a clearly known cause of, or related to, egg peritonitis there would be tons of hits and sites, if you googled.
It will be interesting if there is any info about the long term effect or cause of lashes.
Imp
Glad I helped.
If you find any good info on them, please let me know. I could not find much when I was looking for it.
Grab a link if you can and post it here, or send it to me via PM or Email
Thanks
A very curious imp
Glad your chicken is OK
This gets posted occasionally, truly weird. Seems to happen rarely. In the UK I believe it is called a "Lash"
Here's a discussion about them:
http://www.growfruitandveg.co.uk/images/gyo_welcome_message_v1.jpg
Imp
ETA- I don't think it's dangerous, just odd