I've only had my hens for 8 months now so I'm still learning. I noticed one of my girls sleeping for the past few days in the nesting box and not wanting to leave. She has been loosing weight. I discovered a mass in her chest, not her neck. I was told it sounds like crop. I was told to massage it and give her grits and olive oil. I've been doing this for two days and its getting smaller but it's hasn't gone away. In afraid she isn't getting enough to eat or drink. Will this mass eventually pass or does she have to throw it up? Am I doing the right thing it does anyone have a suggestion? Here is a picture of it.