Anyone who’s been downwind from a Kansas feedlot knows the pungent odor of cattle crowded together while they’re fattened for slaughter. Now there’s a drug for cattle that can cut back on the threat that ammonia poses to air and water quality. The only problem? The cattle industry doesn’t have much incentive to use it. Corinne Boyer of the Kansas News Service reports from Garden City on why the drug may be a tough sell.