I have been getting a lot of Private Messages from peeps here with birds that have chronic cases of sour crop....crops that just don't heal after long treatments. Now, this does not pertain to birds that have slow/sour crops due to other health issues where sour crop is a secondary problem, nor does it pertain to birds that are on the edge of death. (sour crops are quite common in birds near death) This is for those birds that really do just have a slow or sour crop that just will not respond to any treatment. As for all the peeps that have been pm'ing me, I am finding that there is a LOT of this going around these days. Crops that just won't heal. I have a hen that had a very chronic case of slow and sour crop for nearly 2 years, starting at 6 months of age. I suspected the feed as the culprit, but because none of the other birds seemed effected, I came to the conclusion that she had some internal issue going on. I was able to keep her going over the 2 years, but not without constant attention to her crop. I tried different feeds over these 2 years and sometimes she seemed to be much better, but always relapsed. So I started to do a lot of research on chicken feed and the ingredients in it and how it is produced. And I have since learned that chicken feed makers not only are constantly changing their feeds, but they are switching over from corn as being the main ingredient, to using field peas. Of course this is being done not necessarily for the health of chickens, but because of cost. Field peas are actually good for chickens as they contain an easy to break down and a usable protein, many trace minerals and vitamins, but they also tend to slow down the digestive process in the intestines. This is actually a good thing as it gives the chicken time to absorb nutrients that otherwise move very fast thru the intestinal tract and do not get absorbed. But some birds already have slow moving intestinal tract to begin with. And it is these birds that can not tolerate field peas. And so what happens is, they eat this feed, the crop starts to move at a crawl, and before you know it, the bird has a sour crop. So no matter how much treatment you give to the bird, the crop remains slow and sour. And just because only one of your chickens is having this issue, doesn't meant the rest will either. But back to these peeps pm'ing me, when ever I have them stop feeding the layer feed for a few days, feeding the bird some rice, hard boiled eggs, meat scraps, etc...the bird heals within days. When the bird is put back on the feed, the crop relapses. Then a permanent feed change heals the crop up quick. So I want people out there with a chronic case of sour crop to be aware of this feed issue. Field peas are becoming the norm now. Some people may chose to put the bird down in this case instead of going further with healing the bird. But for those that want to save their favorite bird, consider a feed change. Read the label to see if it might break down the grain products the feed is made from. Some manufacturers do break it down, some don't. See if you can find a feed that uses corn instead of field peas. I had to switch to homemade chicken feed to save my sick bird. She is my favorite hen and I just couldn't stand to see her sick anymore. She healed up immediately and has not had a single episode in 9 months now, (she is 3 years old now) where as before, she could barely go 2 weeks without needing a vomiting. If no other treatments seem to work after weeks of treatment, consider a feed change.