I just posted that my chickens survived their first illness with what must be Coryza.The feed store guru advised me to add tetracycline to the drinking water. He must be savy, because he warned me that I should also get the Tylan before I could find the info here on this board. Only 3 of my flock got really sick, so perhaps the medicated water helped too??? My question now is, how long do I have to wait to eat the eggs after stopping the tetracycline in their water? They're laying good and it's a shame to find those pretty eggs, but I don't want to take a chance on human consumption (although the hens have developed an appreciation for eggs!). Thanks; I get wonderful guidance here, really!