Well, this is my first post and boy what a post. I have been searching other posts about cysts on chickens and can't find anything exactly like what I experienced today. I was checking over my English Buff Orpington hens and on the underside of the breast I found what looked like a plug or cork(about 1/2 inch in diameter) different in color from the skin but not dark. Her breast feathers were damp and that is what made me start looking. I gently pushed at the side of the thing and yellowish fluid leaked out. I yelled for my husband and he brought me paper towels, tweezers, peroxide, and neosporin. I gently pried out the( cork?) and it left a huge hole. I could see lots of yellow cheesey stuff (have sense read that chicken pus looks like that) and I gently removed it. A LOT of it! Over a tablespoon. I could now look down inside her breast and could see meat. I removed all the pus I could see and poured in peroxide. Interestingly there was not as much foaming of the peroxide as I expected. I then stuffed it with neosporin. She tolerated all this very well. Not happy, but not flinching or seeming in pain although I'm sure it hurt. She limped for a bit after I put her down, but then started acting like a chicken again. She had not been acting like she felt good for a few days before today. So, have I done the right thing?? I have done similar surgeries on rabbits and I just did what seemed to be needed. Was I right? Has anyone else experienced this? She is a beautiful bird and I hope to use her in my breeding program. I didn't even consider calling my vet because he has already told me he knows nothing about chickens.