I posted my chick picture in the "what breed is this?" thread, and from suggestions there I assume it is probably a Sultan. Too much leg feathering for a silkie, not to mention the white silkies can be quite hard to find so for me to get one by accident would be strange. It was also much too large to be a silkie egg. The only feature that doesn't match is that it only has 4 toes instead of 5, so maybe a poorly bred one? We just hatched the Lakenvelder eggs for fun, if they are female we will keep them for our layer flock, but we will be maxed out space wise for roosters.
ETA:
symptoms from our outbreak- the auction chicks (silkies) that were sick had a single eye swollen shut, so bad I thought one of them had lost an eye, they were filthy matted, luckily no creepy crawlies on them though. Also an occasional sneeze although I thought nothing of it at the time. I assumed the eye problems were pecking injuries from overcrowding. Cleaned them all up and treated those affected with (human) antibiotic eye drops. Got them all well and put them back in with the others a week or so later. Started seeing a few more with watery swollen eyes, that's when I started to suspect these were NOT pecking injuries. At this point I segregated my babies out and brought them inside. Within a few days we had a dog incident and all the auction babies outside were killed. One week later I started noticing a swollen eye in one legbar boy, As I looked and watched I saw watery, bubbly corners in their eyes, slight nasal discharge, and a few with a swollen sinus/eye on one side. This is why I am fairly certain it is one of the bad ones like MG. Did not notice the sneezing like I did from the silkies. Another female CL has symptoms today. I am down to one male and two females, also two black ameraucanas and a blue ameraucana with the CL girl in isolation that I am unsure about.