The usual dosage of metronidazole is 50 mg per pound, 250 mg for a 5 pound hen, given orally once a day. I am not familiar with the product you listed, but FishZole is available online from several sites in 250 mg capsules.
I will be honest, but I would get some of the yellow plaque material tested by your vet. Talk to them, just say you want to take a scraping or a culture, and get it looked at or tested for whatever it is. It might be more simple and less expensive (to get a diagnosis) to just send an affected chicken body into your state vet for a necropsy. But younreally should not consider breeding and selling chickens with this disease going around. Most textbooks advise culling chickens with canker.
As I said in an earlier post, many diseases—fungus, protozoa, bacterial, and viruses can cause diseases that cause the yellow plaques. I would first try to get a diagnosis, then treat or cull birds. It just seems treating this and that, and really not knowing what you are treating, is not the way to go.
A fecal test can diagnose Coccidiosis. That you have already treated. So perhaps getting the canker/whatever diagnosed, and then treating would be the way to go. Here is some info on canker:http://www.poultrydvm.com/condition/canker
I will be honest, but I would get some of the yellow plaque material tested by your vet. Talk to them, just say you want to take a scraping or a culture, and get it looked at or tested for whatever it is. It might be more simple and less expensive (to get a diagnosis) to just send an affected chicken body into your state vet for a necropsy. But younreally should not consider breeding and selling chickens with this disease going around. Most textbooks advise culling chickens with canker.
As I said in an earlier post, many diseases—fungus, protozoa, bacterial, and viruses can cause diseases that cause the yellow plaques. I would first try to get a diagnosis, then treat or cull birds. It just seems treating this and that, and really not knowing what you are treating, is not the way to go.
A fecal test can diagnose Coccidiosis. That you have already treated. So perhaps getting the canker/whatever diagnosed, and then treating would be the way to go. Here is some info on canker:http://www.poultrydvm.com/condition/canker
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