It may be fowl pox, a virus spread by mosquitoes. With silkies, it's always very hard to see lesions on their skin with their coloring, but fowl pox can look a little different in them. Put some iodine on the scabs, trying not to disturb them, to dry them out. Get some Terramycin ointment or Vetericyn Eye Gel or Eye Wash to apply to the affected eye twice a day to help prevent bacterial secondary infections which may lead to blindness. Sometimes the wet form of pox can cause lesions inside the throat, airway, esophagus, and sinuses in some chickens, which is more dangerous that dry pox. The lesions may be yellowish in color, and cause the bird to have difficulty eating and breathing. There is no treatment for pox, other than to watch and treat secondary infections.