This morning I noticed my one hen was lethargic. I picked her up and noticed she had a swishy feeling to her chest. I thought maybe is was sour crop. But there is no odor coming from her mouth and I did the crop massaging procedure but she didn't expel anything. When she stands she jerks back like she's trying to cough. She's an older hen and its no surprise her health is declining. I was just wondering if anyone had any ideas as to what it could be other than a crop problem. Right now she is in a nesting box. She lets out a small cackle when she exhales. My other hens are acting completely normal. Thanks!!