Thank you for getting back!What is your location? Are there mosquitoes out now? Have you seen any other scabs on the other chickens or on unfeathered areas? How old is the chicken? Fowl pox sometimes looks similar on very young chickens, but the possibility of can er is also there. Do you have a vet that could see you chicken?
We are in South France, quite warm climate with lots of mosquitoes! It's getting cold but even now in Novermber there are still some of them lurking...
We have two more hens but I don't think I see any scabs on them.
The hen with the lump is about 1 year old.
It has been quite healthy otherwise, fluffy and active.
We have got a telephone number of an avian vet from our dog's vet, but to be very honest we are not sure if we are prepared to spend a lot for the hens.... feeling so bad saying this.