I have 5 silkies now in my flock of chickens and after being gone for two weeks(got back last week) I am just now getting around to checking my chickens for health issues. Well, I noticed one of my blue silkies didn't have as much poof around her face as she did before I left...Thought it was just teenage gangliness. I picked her up and around her neck the base of the feathers looks like they have dry skin bunched up at the base by the skin. The others had it too except my oldest silkie. It comes off fairly easy but is making the feathers look a little thin in that area. There is none in the poof area just below it around the top half of the neck. There isn't any on any other part of the body either. Would rubbing Vetrx around the neck help get rid of this?