Here's just a little bit more info on chicken feed at least here in Ontario. Yes, it is correct that laying hens are not fed antibiotic feed. However, they may have been during the first few weeks of life when most chick starter is medicated. When I am buying starter feed, I always specify non-medicated, otherwise I would be sold antibiotic feed automatically. Then, there's the difference between broiler feed and laying feed. Most commercial meat bird feed does contain antibiotics for preventative measures. Chances are in a laying system that if one hen gets sick, time is not taken to make it better again, it goes out in the compost pile. It's a very complex system.
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