Thanks for the reply. I read through that link and she has zero other symptoms minus this little cyst-looking lump. No drainage, no sneezing, eating well, etc. She is definitely #8 out of 8 hens and is pecked quite a bit during food times, etc. So perhaps it's an injury? There was a previous post about a hen losing neck feathers and also developed a lump. I got this hen from a friend who breeds chickens (and has about 50 hens all the time) and when she came to me, she was missing neck feathers. My friend said she was probably picked on in her flock. My friend said she isn't too worried about this lump (I sent her a picture) and recommended some spray that is helpful for a variety of skin issues. Brand name is Vetericyn. I may try our local feed store later. I'll keep this post updated as things go on. She laid an egg today, beautiful and green. So I'm not going to worry until she acts ill. We've lost a couple (one to the dogs... then the newest top hen decided to peck the dachshunds and they've learned to live in harmony) and two years ago lost a hen to an unknown issue. Here in Texas, we don't get too attached to our "livestock" animals.