Eye filled with white puss

[texsus]

I have had two chickens (5 mo. old) come down with something that has infected their eyes. The first on I noticed after it had crusted over. And the second went from a white puss film to a scary crusty closed eye. What would cause this? What steps to I need to take? Thank you.

 

[faykokoWV]

http://www.shagbarkbantams.com/page22.htm

maybe this?