[riku_iki]

Maybe it is not a big deal? Chicken goes through withdrawal period and level of residue is tested in end product, supposedly..

[hermitcrab]

If you pump livestock (chicken, cows or pigs) full of antibiotics, surely they are going to piss/crap a lot of it into the environment, hastening antibiotic resistance.

[riku_iki]

but it will be localized farm environment only..

Its just question of risk/benefit ratio, benefit is clear: cheap meat, because producers will be less impacted by deceases. Risks are not so clear in this case.