My flock was suffering from runny bloody poop believed to be caused by e-coli bacteria. I've been treating them using Sulfamethazine Sodium for the last 6days (today is the last day of treatment). Each day using less Sulfamethazine Sodium. They all seem much better and I haven't seen any bloody poop in the last few days. My question is I just found out you shouldn’t use it in Egg laying chickens. Well of course my chickens are egg layers and I need to know the side effects if will have on them. How long after I stop treatment can I start eating the eggs again? And will it permanently cause infertile eggs? Or just for a certain time period? There was a bit of a language barrier problem that's why I didn't know you shouldn’t use this treatment on egg layers. Any info you can provide would be greatly appreciated. I haven't eaten any eggs since I started treatment. Thanks!!