The FF seems to be a minor player in all the things gone wrong in this scenario. The antibiotics given kill good flora in the gut and feeding FF while still killing good flora isn't going to fix the gut until AFTER the antibiotics have been finished for 48-72 hrs~in essence, the antibiotics were killing all the good guys too. The feeds given in all this mess really had nothing to do with what resulted in those birds, IMO. I believe the consumption of hay with the pathogens(feces, molds, and fungus therein) introduced into a an essentially dead gut flora(killed by antibiotic usage) after antibiotic use allowed the overgrowth of the wrong kind of yeasts.
I don't believe the FF had any impact on this outcome at all, not worsening it or compounding it in any way. But...that's just a nursing standpoint and I have no proof of that, just an understanding of the body and how antibiotics work on it. I think in the whole saga, giving FF was the only thing that was done right. Sick birds, enclosed, warm, damp space, ingestion of contaminated grasses that could not advance out of the crop, then followed by broad spectrum antibiotics, would have produced the exact same results if the birds had NOT been eating fermented feed.
The only positive and healthy move that was taken in that whole story was the feeding of feeds that boost the immune system and populate the gut with normal, active organisms and it could have even helped the birds recover more quickly than they would have otherwise.
I agree with you that the whole cascade of events was precipitated by two things: impacted crops, and antibiotics which disturbed the healthy flora in the crop.
That said, once the antibiotics were stopped for a month and the crop cleared, there were still crop issues due to the overgrowth of some unhealthy flora, or flora that are unhealthy to the bird when in high numbers.
These pathogens only responded when we made the crop's PH higher (more base). That is the exact opposite to what happens when you give apple cider vinegar and use ff, which is a lacto acid fermentation.
I just wanted to share this with the group.
The bird is not out of the woods yet. She would be if I hadn't held her in such a way that she spit up and aspirated on it. She seems very healthy now and the crop is almost behaving normally less than 48 hours after stopping trying to make the crop more acid. She is now on injectable Baytril (a powerful antibiotic) for the next 10 days, I think, so I will have to be very careful with her that we don't get a repeat of a flora imbalance in the crop. Let me rephrase that--I'll have to be careful that I don't make the already imbalance of flora worse again.
I believe whatever microbes ferments feed set up shop in her crop and caused all the gas problems, which caused her crop to be unbelievably huge and distended. A stretched crop is a flacid crop which doesn't work. Everything was flacid and she was trying to relieve the pressure and ended up spitting up and aspirating. The gas-producing, acid loving microbes might never overpopulate a healthy crop that was emptying properly, but she started with a crop that was positively putrid. I'm shocked she lived considering how sick the two of them got and how toxic the crop contents had to have been. While many might want to cull her for "unthriftiness," I am leaning towards believing this bird is as tough as nails who ran into some bad luck from human (mis-) management.
I'm feeling a bit superstitious about the whole FF thing. FF goes against every part of my being that believes in fresh food, and fermenting is basically decomposition. I need to get over my superstitious reaction. I am thinking of starting another batch of ff, but it will take me a few days I think before I get over my fear.
This bird, should she live and not go on to develop aspiration pneumonia, will not have access to ff for quite some time. I need to get her crop in shape before I add a lot of acid-loving microbes (that is in ff) to a crop that is short of the microbes that keep everything in balance.
I would appreciate some advice on repopulating her GI with good microbes but not by using ff. I may ask the vet about probiotics. He originally wanted to be a poultry pathologist but decided he truly enjoyed chickens too much to only work with dead ones, so he switched from poultry science to being an avian veterinarian.