Does any one know what this is or what could have caused this? Should I be worried? I had went out to scrape the poo off the top of the nesting boxes which is so gross smelling ) and found some yellow on a poo grabbed the camera and took pics. I know thisn isn't normal because I have never seen it. I have only seen white with thier poo. Nothing in thier diet has changed either. apples, scratch, grains, free range and the occasional greens from the green house.