For a while now I have noticed this white flakey stuff on my silkie and my sizzle it's kind of crusty and they are the only 2 that have it. They are both 2 1/2 months old and still feathering the silkie has it around her face also ! I'm new to chickens only had then for about 5 months ! I wouldn't think it was lice or anything because none of the others have anything on them and they have all been together since hatched ! Here are some pics I got last night !