My chicken has this same issue. I finally found a vet and they took her in. Gave her antibiotic to see if it would go down. No change. Vet Said it was in the ear. A solid hard mass. They tried to drain but got Nothing. Told me the chicken would have to stay that way cause no vet would work on a...
My name is Tamera and I am the adopted Mom of Kevin the Brahma hen. She was found at about a week old alone under a car. I think I have been a good Mom as she grows...She seems happy and healthy...very normal chicken, except this bubble on her face. It has been there since feathers started...