I bought 4 chickens from the local feed store. Within a day one started pooping blood. I did some research on here to figure out what the problem was and how to fix it. I spoke with the lady that I bought them from and she gave me what I believe is an antibiotic.. I really don't think that would fix them so I went to a feed store about 15 min. down the road and spoke to them. I lost 1 and the other feed store gave me diatemicious earth to give them. It is food grade and is given to all kinds of animals for internal parasites and worms among other things... I just mix the reccomended amount in their food and they eat it. Fleas ticks mites ect. you put it on the outside of the animal and it kills the bug by dehydrating them.. Has anybody used it for chickens? It seems to be working with the antibiotic. They aren't pooping blood anymore. I have read to use Ivomec Eprinex but no feed store around me carrys it. Thanks for the feed back. after giving antibiotic I have also heard it is good to mix a bit of yogurt in the food so their probiotic get back on track..