I don't like to get into contests about dosages. I went to the Corid website and found nothing about chickens or chicken dosages. My dosage comes from quoting other knowledgable people (such as Dawg53 and others) on BYC. This medication is used off-label like many others we use for our chickens. If you have info to share from the Corid manufacturer, by all means, print it here, and I will follow their directions. There just seem to be too many people quoting the dosages that seem too weak to me. The problem with all of these meds is that the drug companies don't put the dosages out there, and the educational sites on the web don't talk about it either.