The issue focused minds across Scotland today after Edinburgh Zoo unveiled plans for its zoo lions and tigers to roam freely throughout their enclosure.Animal lovers gathered outside Edinburgh Zoo's Aberdeen Parade enclosure where they cheered as lions climbed trees and tigers poked fun at Edinburgh landmarks such as Edinburgh Castle and Dundee Cathedral.Royal Highland Wildlife Park spokeswoman Eleanor Wilkinson said she welcomed the lions returning to their enclosure after spending nearly six weeks locked away from visitors."Their reintroduction follows excellent veterinary treatment," she said."Their veterinary surgeon Ian Jarvis praised their bravery