Hen has black spots on her comb. Help

[silverwarrior]

I have a 5 months old hen and two 1-2 month old chicks. I don't really pay attention to her comb but a week ago I saw that she had BLack spots on her comb and beak.one of the little chicks also has that same spots. Little chick:

Hen:

Should I be worried? two little chicks I keep separate from her. Should I put them together?

 

[BoomChickaPop]

This happens sometimes. I am not sure of the reason.
You can put coconut oil on their combs, too heal it. They also LOVE to eat it!
The black spots won't kill them, I believe they go away eventually

Hope this helps

BCP