However the surprises hadn’t finished yet. Some days later Jim saw something was going on in the tallest bush that grew in the middle of the roundabout.
The rats had been born and bred in laboratory conditions. They had learned to find their way through mazes and get their food by operating various cunningly designed boxes.
What could be simpler than going to your local supermarket, wandering round and choosing your requirements from a list written out in the peace and quiet of your own home?