First thing I did was go thru other threads to see if I might have some of the same issues. My roo has not been given any additional things to eat. He gets lay crumble mixed with scratch. He is penned. Only contact with other birds is thru the cage so it is minimal to none. Cage is above ground, not resting on the floor so his droppings go thru. Only evidence is stuck on the feathers on his tail and below his vent. He is usually very aggressive and flogs, so when he didn't even try to get away from me I knew something was wrong. Today is the first sign I have seen of him being ill. droppings are sticky but not not completely firm. Bright green, almost like frozen, thawed spinach, with some slight yellowing and then white. Best I could do was take a picture of it in the sun and in the shade, plus one of him with his tail drooped.