Please help?

My favorite hen peachy isn't feeling good. Her tail is bobbing and she's a bit lethargic. I examined her a bit and her crop is small and hard, she also started struggling to breath when I picked her up and tried to get away (this is the most cuddly chicken I've ever had she ADORES being held) I put her in the garage with water and the Internet told me not to give her solid food for 12-24 hours so I crushed up a boiled egg (without the shell) and gave that to her. I saw someone say online to feed a chicken with a bad crop some olive oil and massage the crop so I might try that tomorrow. I'm very worried about her she's one of my best friends honestly, she was the first chicken to ever run to me for cuddles instead of me having to chase or pick them up lol.