I have been treating my chickens for cocci for 3 days. Most seem better today. I have lost 3 though. I keep hearing this strange squeaky noise. I thought it was a lil roo trying to crow. They are around 9 weeks. I have seen some swipe their beaks on the ground. I have not noticed any discharge. Could i give them doxycycline?? Along with the corid? Im new to chickens. I have 100 mg packets of doxycycline. What would the dose be and how many days. I dont want to loose any more.