They can. On the bright side, mine had it early spring last year, they have not had it since. They did not develop the Wet Pox. All appeared as scabs on their combs, waddles and I do have a CCL mix hen who got it on her eye. She is now blind in that eye.
Sorry it took me so long to get...
This is a website I found describing fowl pox.
http://hoeggerfarmyard.com/how-to-easily-diagnose-and-treat-fowl-pox/
Hopefully this will explain it a bit. I am having trouble getting it to post here.
Looks to me like fowl pox. I had to treat my flock for it last year, but I will have to look up treatment because I can't remember. I do remember putting a capful of bleach in the water. Seemed odd to me, but it worked. I'll look it up later & get back with you if no one else has. Got to go...