5 week old Barred Rock. Its been 4 days since she was at the bottom of the coop not responding or moving. I picked her up and she was very cold to touch, lethargic looking and having a difficult time standing, holding up her head. I immediately got a heating pad on her and noticed that she was producing very thick amounts of saliva in her mouth, drooling. I helped remove what I could in hopes it would help however it has not. We've looked in her throat to rule out obstructions and saw nothing. We've done the tip upside down method to help see if crop is impacted.. nothing. We've noticed she is very hunched together? She looks kinked? Kind of leaning to the side? Her neck doesn't extend all the way up and stays very close to her body and her tail is also down and to the side. Tonight I found a lump at the beginning of her throat? She hasn't eaten and swallowing water is very difficult for her as you can see her chest working to get it down. I asked about Gape Worm told she was to young for it and was treated at the hatchery. TSC suggested VetRx and digestive and vitamin supplements in her water. Done both. Its been touch and go. She doesn't appear to be passing anything. No one else has any of her symptoms. I haven't a clue what this could be. She also doesn't appear to be getting any bigger ? Her sisters are double her size. I'm wondering if maybe she was sick prior and we weren't aware? I've googled so many possibilities and I'm just puzzled. What does this sound like?