The larger of the two major growers here in California, Foster Farms, sells only "all natural" chickens and turkeys without additives and does not use Roxarsone.

I haven't been able to determine yet whether the other big seller here, Zachy Farms, uses Roxarsone or not.

Elsewhere, Tyson Foods and Perdue have sworn off Roxarsone.

Most organic growers do not use Roxarsone, though their prices are a bit high.