I read on BYC powdered garlic, ground ginger and ground cinnamin - potent stuff. My girl wouldn't go near it though. I'll see if I can find the link. http://justcockatiels.weebly.com/sour-and-slow-crop-remedies.html If you scroll down you'll see the spice recipe. For my girl I did what it seems you are doing w/o vomiting. I was to afraid to drown her. Seperated her into a dog crate. No food, just acv water for 24 hours. On day two, I started giving her probiotic capsules mixed with warm water. I dropped them on her beak and massaged her crop as often as I could pushing down so to work the blockage through. On day three I gave her feed mixed with warm water and more probiotic capsules (made sort of an oatmeal) which she devoured! My girl wouldn't go near the yogurt so i had to improvise, this really worked for her. I had some capsules in my fridge from when i had stomach issues, but you can pick them up at any super market, pharmacy. Also, it took time. almost 2 weeks from start to finish. It started to dissapear after a few days but then came back so I had to begin the process over, hence two weeks. Good luck! Just wanted to add this as another possible solution: http://www.twincitypoultrysupplies....ain_page=product_info&cPath=3&products_id=210 Not sure it works, but a fellow BYCer suggested it when my girl had issues.