On: U.S. FDA to phase out some antibiotic use in animal production

[sneak]

This seems like exactly the kind of "slowly and steadily select for antibiotic resistance in bacteria" behavior that they're trying to avoid with these changes.

[raverbashing → sneak]

Maybe

But below a certain concentration some antibiotics won't have an effect hence, no evolutionary pressure

If at the concentration presented it kills/affects some bacteria, yes, what you mention happens, otherwise it doesn't.

Of course, I may be wrong