The Animals of Farthing Wood (1993)

S3E4 The Missing Fox's Friend

As Bully's rat population swells, the number of vanished animals rises alarmingly. When Dash spots Plucky being carted off in a cage to a truck, she resolves to track it down, only to find herself blocked from entering a strange facility enclosed by tall walls and spiky gates. Meanwhile, the Weasels seek refuge at a farm, but the local animals refuse to welcome them. Just when things look bleak, they are joined by a new ally, Rollo the Sheep Dog, who steps in as their Protector.