I have 30 3-week old chicks that were vaccinated from the hatchery. but now I see bloody poop in some. Not all of them. But I don't see any of them lethargic at all. they seem just fine. I do have corid at home, should I give it to all of them? its impossible to tell who has bloody poop and who doesn't. so if I give corid, it will go to healthy ones as well... is that ok?