Green Eggs

Recently, I had a call from Mexico regarding a quite rare occurrence. Eggs started being green (slightly so, but definitely greenish!) The owner was alarmed because the eggs were for the fresh market. The attending veterianarian had rulled out any disease problems and it was left to the feed. So, they contacted me!   As it happened, after some questions back and forth, this producer had recently been offered a cheap load of imported cottonseed meal and he had started using it at 5% in  all his