blackhead cure info

[hensgottalove30]

I have 3 grown hens and one rooster the hens has stopped laying they have black Combs im seeking info on the disease if it is curable and if that is why my hens stoped laying and there not eating good and ive seen fish tablets work is it a cure.And will they alwaysbe carriers of the disease so not sure wha route to take no one has helped me calked county agent but never got a calk back was hoping I could find some answer s here if anyone could help me

 

[CluckyCharms]

Sounds like avian pox/fowl pox (dry) to me but...some pictures would help if you have any.

Does it look like this?
https://www.backyardchickens.com/a/avian-pox-how-to-treat-your-chickens-for-avian-pox