For ruminants, yes. But I think "just" might be understating it. Corn-fed cattle do not have the proper stomach ph to naturally protect against bacteria overgr

For ruminants, yes. But I think "just" might be understating it. Corn-fed cattle do not have the proper stomach ph to naturally protect against bacteria overgrowth in their stomachs (whereas if they consumed solely grass, this is naturally not a problem). As a workaround to the bacteria problem they are force fed antibiotics for their entire lives. Additionally: corn fed cattle yield 30-50% more meat because they are insanely obese. Beef producers have a perverse incentive to keep these animals in confined conditions (read: knee deep in their own shit) so that they don't get too much exercise. When you eat conventionally raised cattle, you're consuming the meat of a crippling infirm animal that lived its life in appalling conditions. It's a bad scene.