True, what everyone has said. Chickens die, this is a fact of life. If you beat yourself up every time you lose one, pretty soon you will not keep chickens any more, it will be too painful. I mourn my losses when they happen, but I try to remind myself that once they are dead they are no longer suffering, they are at rest. This comforts me. I have been young and now I am old. I have lost not only chickens but well-loved dogs and even human companions. This has given me perspective. I agree with the child quoted above. The best way to celebrate the life of a beloved pet, be it chicken, cat, or dog, is to get another one. The joy of watching a new life grow helps to heal the saddest heart. It does for me anyway. Blessings to you. 
