give them some vitamins and electrolytes. if you can, use vitamins E,D, and selenium. also, if your using medicated starter it might be best to switch. amprolium can block some vitamin absorption.For you that have raised silkies, is it common for them to have a little head shake tic? I just noticed this behavior. Three of the four are doing it. They are acting normal, eating and drinking. Is this something I should be concerned about?