from farmerpete. just bought six baby black sex links ,six baby rd.island reds,and two araconas. They are starting to die, and a couple of our other young chickens they are in with have died also. This morning we noticed that one of the sex link chicks is pooping blood. should i notify the feed store where we bought them at ,or can someone here tell me what kind of problem they have and what should i do with the chicks?