Impacted crop

I have a hen with an impacted crop. She has been within feed since yesterday evening (almost 24 hours) and her crop is still rounded and firm. She is pooping. Acting fine. Before I took away feed, her crop didn’t stay bigger, so I do believe some food is passing through still. I have tried offering her coconut oil and she’s absolutely not interested. I’ve massaged her crop a little. I can’t just starve her indefinitely so what can I try next?