On this farm, they raise chickens free-range.
放し飼いの牛はストレスが少ないと言われる。
Free-range cattle are said to have less stress.
letting run loose; letting run free
Used for pets (especially dogs) or children allowed to move around without a leash or close supervision. Often implies a lack of restraint.
公園で犬を放し飼いにするのは禁止されています。
Letting dogs run loose in the park is prohibited.
放し飼いの子どもが道路に飛び出して危なかった。
A child who was allowed to run free dashed into the road and it was dangerous.