His droppings look ok to me. If he is eating, drinking and behaving normally, and crowing, I wouldn't worry about it.
Are the seeds that you've been feeding him greenish? Maybe the granules in his poop are partially digested seed particles? Try eliminating the seed for a few days if you are really concerned.
Are the seeds that you've been feeding him greenish? Maybe the granules in his poop are partially digested seed particles? Try eliminating the seed for a few days if you are really concerned.