This is my first experience with babies... but have had hens for a whie. I started my chicks on Cordi yesterday because I had found blood in its stool and was not acting like a "chick". So I went out to get the meds and started my whole flock ASAP. Today about 31hrs later from starting the cordi, I have had 2 die I changed the water, I changed the bedding, I washed everything down, I saw them both drink the water. What did I do wrong? How long does it take the meds to work? Im as so sad with this being my first attempt at just having young chicks, I cant even begin to think about hatching eggs!