May I suggest a revision?

One morning, a cock was busily scratching for food in f ront of a farmer's house. He unexpectedly found a glittery jewel on the ground. He mumbled to himself "If the farmer was the one who found this precious stone, he would be really happy. Well, it's nothing for me. I would rather have a tiny grain than this jewel." Then, the cock walk ed away and kept scratching for food.