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Dr. Jo
Dr. Jo, Veterinarian
Category: Bird Veterinary
Satisfied Customers: 2818
Experience:  DVM from Iowa State University in 1994; actively engaged in private regular and emergency practice since that time, with a heavy emphasis on avian medicine.
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When can I resume using eggs after administering tetracycline

Customer Question

when can I resume using eggs after administering tetracycline hydrochloride for 5 days to my hens
Submitted: 1 year ago.
Category: Bird Veterinary
Expert:  Dr. Jo replied 1 year ago.
Hello,I'm Dr. Jo and I'm here to help you with your question about the withdrawal period of tetracycline. (typing more below)
Expert:  Dr. Jo replied 1 year ago.
The article I've linked to below is probably more scientific information than you're looking for, but I want to be sure I give you accurate information. This is the study that was done to get the statement regarding NOT FOR USE IN LAYING HENS off the package.
Expert:  Dr. Jo replied 1 year ago.
The fact remains, however, that the withdrawal period for eggs after using tetracycline has NOT been established. It is up to you to decide when you can start using the eggs again.
Expert:  Dr. Jo replied 1 year ago.
Because this is a common question, I frequently tell people that based on other studies, I would expect the eggs to be safe to be safe again after six weeks. I know that is an outrageously long time, but I have to be conservative since the real answer to the real question of how SOON are they safe is unknown.
Expert:  Dr. Jo replied 1 year ago.
It's also really important to check the package of the product you actually used very carefully. If it says NOT FOR USE IN LAYING HENS, then the rules clearly state that the eggs from these hens must never be eaten. That's the rule, however; whether or not it would be safe to do so is uncertain. Does this help to answer your question at this time?
Expert:  Dr. Jo replied 1 year ago.
For additional research, this website is very helpful. can look up your specific brand name of tetracycline and see if it has a withdrawal time for eggs listed on it. There is at least one brand name that has a 0-day withdrawal, which means you can use the eggs right away.
Expert:  Dr. Jo replied 1 year ago.
If you're planning to use the eggs yourself, the liability is minimized. While the drug is overall a safe choice, the liability is completely yours if you sell or give away these eggs and someone has a reaction somewhere down the line. When egg withdrawal times are not established, that means no one is going to promise you the eggs are safe for consumption, ever. Period. Sorry to be the bearer of bad news, if that's the case.
Expert:  Dr. Jo replied 1 year ago.
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Expert:  Dr. Jo replied 1 year ago.
Hello,Just checking in to ask how things are going with your laying hens. Thank you,Dr. Jo