it was left-over unused produce from a restaurant, so salad greens and other veggies.I wonder if it was the result of what type of produce they fed them? I was in the habit of taking just about everything that came from my garden weeding and trimming to the a pile that my flock would peck and scratch through daily, and after losing one bird to what looked to be a digestive problem I found that several things I was giving them were either toxic, unhealthy, or known to cause egg problems. Now I am more careful about what goes to the girls and what goes to the compost bins. My initial thought that they'd know what to avoid on their own was surely wrong.