That is an awesome thread. I've never had thrush but it was very informative and interesting.
I too have used Vetercyin for wounds and wow...good stuff. It is basically a heavy amount of sea salt. Basically what the dentists say to use to kill bacteria in the mouth after a heavy cleaning, to rinse your mouth out with salt water for a few days following. I also liked the Listerine suggestion, but like she said in that thread, make sure it is the the kind with alcohol still in it. There was another thread I read a few days ago that said cream for clearing yeast infection for women works well too. I'm not sure what kind would be best or safest but it made sense.
Here is a note I read on the topic of thrush:
Probiotics are some of the underestimated remedies that help the body against bad bacteria. The amount of beneficial bacteria will keep the gastrointestinal tract healthy and will replace the candida in the body. The logic is that as the beneficial bacteria outnumber candida the risks of getting infected will be significantly reduced. You can get probiotics through yogurt and other food products. To fight candida the body needs to have at least 30 billion Lactobacillus acidophilus and bifidus bacteria. Make sure that you are taking in live microorganisms by taking a look at the expiration date on the label. http://yeasthomemedicine.com/clear-white-tongue-oral-thrush-yeast-infection-2/
Here is yet another treatment I found page 6
http://www.clemson.edu/public/lph/ahp/disease_links/images/poultrydiseases.pdf
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Candida (crop mold, thrush)
Yeast – usually a secondary problem, prolonged treatment with antibiotics
Symptoms: poor doers, stunted growth, listlessness, roughness of feathers.
Transmission: does not spread from bird to bird, individual bird problem.
Prevention/Control: use copper sulfate treatment in water.
And last but not least natural remidies:
I've ready on this site of many people using one or more of these products for their chickens.
http://www.regenerativenutrition.com/content.asp?id=251