In the US most antibiotics are not approved for egg layers. But since it is okay to to eat the meat with a one day withdrawal time, it should be okay to do that for the eggs. What are you using the Gallimycin for? It is not used that often these days, and there are some better antibiotics for treating respiratory diseases and reproductive diseases. Here is a link: https://www.cvear.com/wp-content/uploads/2012/06/Gallimycin-PFC-product-informaiton.pdf