OK so after I found out that our Red Star pullets/hens have what seems to be roundworms, I have been really worried; especially because Cinnamon, my beloved Red Star pullet, has them. We are currently looking to buy DE or something, but I have no idea how long my poor girl has had the nasty worms. Are roundworms deadly? Can they actually kill a chicken? If so, how long does it take? I'm afraid that something might happen to Cinnamon if she has had them for a long time. Any advice is appreciated. Thanks!