My silkie chicken has a very bad sinus infection. and we didn't notice till we picked her up and saw that both of her eyes were swollen and white stuff coming out with a nasty smell. The pus was in both eyes. The right eye was worse than the left and she hasn't ate or drank we've had to force feed her. I don't know if its too late or not I don't want her to die. Me and my friend pushed the pus out of her eyes and her eyes look horrible ones black (her left eye) and one was red and couldn't see her pupil) and her sinus cavity is swollen how would we get the infection out of her sinus cavity?