If people were willing to pay for antibiotic-free meat, then farmers would produce it. They would call the vet, and maybe destroy the pig rather than treat it with antibiotics.
By the way, you're naively presuming they're using antibiotics when the pig gets sick. Nope, they're using them prophylactically.
In the meantime, I will keep buying antibiotic-free meats whenever I can.
That's a strawman fallacy [1].
> If people were willing to pay for antibiotic-free meat, then farmers would produce it.
Seeing as most farming in the United States is done on megafarms owned by large corporations [2] that have historically shown to be (to put it mildly) lax on their focus on serving healthy and nutritious products to their customers [3], and that "farmers" in the traditional colloquial sense are now only 2% of the population [4], you'll hopefully understand if I say that your statement has little relevance in the United States in 2013.
[1] https://yourlogicalfallacyis.com/strawman
[2] http://thecabin.net/stories/091001/wor_0910010048.shtml
[3] http://en.wikipedia.org/wiki/Smithfield_Foods#Environmental_...