I don't know any "chicken" vets and the only vet that remotely seemed to know about such things told me to order something called Doxy-Tyl and do 2 teaspoons of powder to 1 gallon water daily. However when I asked him about egg withdrawal time he said he had no idea only that he knew you couldn't eat the chickens if you treated them with it. Can anyone help me out? How long do I need to toss eggs?