My 2 1/2 yr old Cochin is sick. She is extremely malnourished and became so while acting normally. I had the same thing happen about 3 months ago with one of my Marans. I had to cull her. I have 25 other chickens who are perfectly healthy and a good weight. (I checked everyone). She eats and drinks. Her legs are a little weak. She clucks happily. Yesterday her urea had a was pink. Otherwise her poop is normal-no blood clots like you see with coccidiosis. What is wrong with my chicken??? I def. need some help. This case has me baffled.