Three hundred cattles that appeared to be in distress were seized from a livestock producer.

英訳に間違いが有れば正してください。

虐げられているように見えた300頭の牛が家畜生産者から押収された。
Three hundred cattles that appeared to be in distress were seized from a livestock producer.

答え cattlesをcattleにする

Three hundred cattle that appeared to be in distress were seized from a livestock producer.

cattleに複数形はない。