I treated my silkie babies with the seven and just put a pinch in the top of their heads to get them there while covering their eyes and beaks and the bugs just dropped dead. I would be leery of putting too much ivomec on her. If it is going to work the correct dosage would work. Too much could overtax her system and you can't remove it once it soaks in. Good luck. I know how frustrating it can be.
sharon