beak problem

[brigitte41]

Hi, i have 11 buff orpingtons 4 months old. i have recently noticed the tops of their beaks going black on about 7 of them. i have taken a picture of the worst affected, do you think i need to take them to the vet? tried to google it to find out what it could be but the closest ive come to is a fungal infection. all are acting normally.

hope somebody can shed some light on this, thank you

looks like a hole starting, but i think its only a circular bit of dry area

 

[Chickery Chick]

I seen another thread here with a chicken with similar black blister in the exact same place and it spread to the others and was dry pox.
This may help you.
https://www.backyardchickens.com/t/822622/pecking-wound-or-fowl-pox