i have a brood of chickens, I discovered one who is very sick. She is 7 months old and I noticed her shivering on the roost this morning with her sisters all being out in the yard. She had slime coming out of her mouth and her crop is huge. I did some research on the crop and thought it to be sour crop. I did what was suggested and tipped her down while massaging and as soon as i tipped her about a cup of liquid came out with some grass in it. She perked up a bit for a while. I also noticed her stool, this was gross...lots of micro sized worms and a little bit of blood on her vent. And the stool seemed very sandy. What can I give her to help. What do I do for the worms, and do I treat the whole flock? I have 18 total. None of the other girls are showing signs of distress. I don't know if this caused the problem, but, I just bought a bag of cracked corn and they've been eating this scattered on the ground for 2 weeks.