If you decide the crop is getting liquidy you can try to throw her up. I would suggest watching some youtube videos of people doing this before you try it. You need to be sure that they don't aspirate the fluid. Also, when you massage you should be holding the hen with your left hand/arm and using your right hand between your thumb and first finger in the downward direction is where the crop should be. Always pushing downward away from the mouth. You can massage pretty vigorously this way without the hen getting fluid up into their esophagus.