I just stopped at my local feed store and I picked up pennchlor 64 (Chlortetracycline HCL) for one of my hens to mix in with the water. My question is should I just treat her (I only have two hens) and separate them during the treatment or should I treat them both? She is not laying yet but my other hen just started laying three days ago. Does this antibiotic make it unsafe to eat the eggs forever or is there a withdrawal period? I haven't found much info about this particular antibiotic and hope someone can give me some more info on it. Thanks!