Easter Egg Chicken Beak Turning Black

[oldtimer]

For years and years, I have raised White Leghorn, Black Sex Link and Rhode Island Reds. 2 months ago, I got some "Easter Egg" chicks. They are all beautiful with puffy little faces. One specifically is absolutely beautiful, she has black and white coloring and looks so much like an Eagle it is uncanny. However, recently the tip of her beak is turning from gold to black. Is this normal? None of my flock is sick. None of them have gotten frost bite. She seems perfectly healthy and active.

 

[Sonoran Silkies]

Some birds have black beaks. I think it is just a part of her development.