Hi Graham,

If the usual has failed to work and she can't take the food in her crop down properly then it's stuck. This sometimes happens if a hen has been eating too much grass. As a last option, you need to try and empty the crop from the bottom up by gently turning the hen upside down and massaging and pushing the contents of the crop out through her beak. Sounds a bit gruesome, I know, but it sounds like it's just not working the other way. Good luck...