I noticed one of my hens was very weak, Laying in one spot a very log time, then I noticed green runny poop. Not eating much and and drinking little. Has not laid an egg for 3 days. I put her in isolation as soon as I saw her laying in the same place for half a day. Feathers don't have that green sheen like the other Australorps, eyes are clear and comb looks good.. She has improved in the last 2 days. Here poop is solid, but still slightly green, almost normal. Eating and drinking more but IMO not enough. And she is walking and talking some. If there is not 100% improvement in the next 48 hours I'm afraid I have to cull her. What I'm worried about is that if she makes a full recovery that she may be a carrier and could endanger the rest of the flock. What to do what to do?