It sounds like she may be impacted as well as sour as has probably been like that for some time. You may need to remove as much of the contents as you can before you start massaging her otherwise there is a chance she will reflux and choke.
My feeling is that this bird is very sick and will die if you don't take some action soon. If veterinary care is an option, get her to the vets asap.
If the vet is not an option, then familiarize yourself with the technique for vomiting a chicken by checking out some You Tube videos. Watch several so that you don't follow a bad example. It is risky, but not emptying that crop is more risky in my opinion. What is in there is stagnant and rotting and not going anywhere at the moment. It needs to come out so that there is room for what is left to be manipulated by massaging to help break it down. She should enjoy the massage or at least not be uncomfortable with it. If she isn't happy, the chances are you are being too rough. She will probably not enjoy being tipped upside down to vomit though, but that gunk needs to come out before you do anything else. You might want to invest in a catheter and syringe to tube liquids into her, to rinse her crop out and a stool softener like Dulcolax may help. If she is really bad, she may need surgery to remove the blockage and I can talk you through that if veterinary help is not possible, but once you get it at least partially emptied and well massaged, it may break up. Often in these cases it is a tangled mass of soggy fibrous material like grass or straw that clogs the outlet of the crop slowing the passage of food and water and sometimes even completely blocking it.
Good luck sorting it. It is no good dilly dallying with this as she will die if you don't get it unblocked.
The risks with vomiting are that she will inhale some of the vomit, so bring her upright and give her plenty of opportunity to breath between spewing up. Also, be aware that she will probably shake her head whilst vomiting and it will go everywhere, so wear an apron/overall.
Best wishes
Barbara
My feeling is that this bird is very sick and will die if you don't take some action soon. If veterinary care is an option, get her to the vets asap.
If the vet is not an option, then familiarize yourself with the technique for vomiting a chicken by checking out some You Tube videos. Watch several so that you don't follow a bad example. It is risky, but not emptying that crop is more risky in my opinion. What is in there is stagnant and rotting and not going anywhere at the moment. It needs to come out so that there is room for what is left to be manipulated by massaging to help break it down. She should enjoy the massage or at least not be uncomfortable with it. If she isn't happy, the chances are you are being too rough. She will probably not enjoy being tipped upside down to vomit though, but that gunk needs to come out before you do anything else. You might want to invest in a catheter and syringe to tube liquids into her, to rinse her crop out and a stool softener like Dulcolax may help. If she is really bad, she may need surgery to remove the blockage and I can talk you through that if veterinary help is not possible, but once you get it at least partially emptied and well massaged, it may break up. Often in these cases it is a tangled mass of soggy fibrous material like grass or straw that clogs the outlet of the crop slowing the passage of food and water and sometimes even completely blocking it.
Good luck sorting it. It is no good dilly dallying with this as she will die if you don't get it unblocked.
The risks with vomiting are that she will inhale some of the vomit, so bring her upright and give her plenty of opportunity to breath between spewing up. Also, be aware that she will probably shake her head whilst vomiting and it will go everywhere, so wear an apron/overall.
Best wishes
Barbara