What is causing the brown crusty spots on the comb?

[NormalZombieChick]

Does anyone know what is causing the brown crusty spots on the comb of this hen? She is an easter egger ~7 months, its summer time where I live, has been very dry and hot. Does not appear on other hens.

 

[LaFleche]

It looks like dry fowl pox to me, a virus transmitted by mosquitos which will run its coutse in sbout 3-4 weeks.
Add some poultry vitamins to their water and avoid stress.

 

[NormalZombieChick]

It looks like dry fowl pox to me, a virus transmitted by mosquitos which will run its coutse in sbout 3-4 weeks.
Add some poultry vitamins to their water and avoid stress.

Thank you

 

[LaFleche]

Here is some more information:
Fowlpox in Chickens and Turkeys - Poultry - MSD Veterinary Manual https://www.msdvetmanual.com/poultry/fowlpox/fowlpox-in-chickens-and-turkeys

And welcome to the BYC community!