Ask the Expert October/November 2019

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Ask the Expert October/November 2019
Reading Time: 12 minutes Coccidiosis   I think that my two older chickens may have coccidiosis. I am putting Corid in the water hoping that my other five younger chickens do not contract it. This is the only thing I have found to use. They do not act like they are sick but neither did the others until just all of a sudden. My question is, can you eat the eggs when they are being treated with Corid? I have found conflicting information online regarding this. Thanks for any information you can provide.   — Laura  *****************  Hi Laura,  Technically, there is a 24-hour withdrawal time before slaughter but no withdrawal time stated for eggs, because residue still falls below U.S. tolerance levels. That said, let’s look at how amprolium works:  Essentially, Corid mimics thiamin (vitamin B1), which is essential for coccidia to live and reproduce. When coccidia ingest it, they die of thiamin deficiency. This is one reason you

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