I have read that its a good idea to put a small clump of grass and dirt from outside in the brooder with the chicks to help start building an immunity to coccidia. I have also read that grass will clog up the crop of newborns. So is it or is it not a good idea to have grass and dirt in the indoors brooder. If there is a chance of causing the chicks more harm, i would think no grass and dirt. Im no professional chicken farmer so I'm trying to figure what is the best coarse of action. Currently i have 2 box brooders in the house. 1 with 6 chicks in it with an outbreak of coccidia at 3 weeks old. 1 with 4 chicks that are 4 days old in it doing ok - This is why I'm asking about the grass. I also wonder if the cocci can be transmitted through the air via the dander from box to box.