It can help to massage the crop to break up whatever is causing it to block.
You need to do it very carefully if it is very full because you don't want it coming up the wrong way and causing her to aspirate.
If it was very full when you felt it earlier, I would wait until the morning to try massage. Hopefully the crop will be smaller then so the risk is less.
Meanwhile, look up the anatomy of the crop so you know what you are doing. You are wanting to break up any fibrous stuff like long grass so it needs a firm touch but not a big squeeze,
I have had to do this a few times to different chickens and I tended to do it very early in the morning and they actually liked it!
You need to do it very carefully if it is very full because you don't want it coming up the wrong way and causing her to aspirate.
If it was very full when you felt it earlier, I would wait until the morning to try massage. Hopefully the crop will be smaller then so the risk is less.
Meanwhile, look up the anatomy of the crop so you know what you are doing. You are wanting to break up any fibrous stuff like long grass so it needs a firm touch but not a big squeeze,
I have had to do this a few times to different chickens and I tended to do it very early in the morning and they actually liked it!