I stay away from anything that has to do with medication. I think that in hatcheries they are required to do that for "precautions"? <NOT SURE But Since I hatch my own babies out, I just give them some Poly Vi Sol for the first week after they hatch (WITHOUT IRON) and then when they are about two to three weeks old, I start introducing them to chopped garlic. Not only is it a natural dewormer, It is an immune builder as well. If you think about the chicks being raised by the mother, they eat dirt and all kinds of things, That is where they could possibly catch the coccidiosis from the garlic will help you build against that when you put them outside for the first time at the age of six weeks. (or however long you keep them inside) Also, if you introduce Oregano, Tumeric, Black Pepper, Ginger and Cinnamon to them, you are on your way to a good start for preventing ailments .. I add those ingredients to scrambled eggs along with some Cayenne pepper for the laying hens.. Good luck !