Rudy Gestede scored the only goal of the game as league leaders Cardiff made it three in a row against Millwall with a 1-0 win to move five points clear of second placed Hull.
Manager Malky Mackay dropped striker Heidar Helguson in favour of 24-year-old Gestede who partnered Craig Bellamy while Aron Gunnarsson also came into the midfield.
And it was the former Metz forward who was quickest to repay the faith of his manager after just eight minutes when Craig Noone beat Shane Lowry with a mazy run before crossing for the Frenchman who tapped home from six yards.
The visitors' problems worsened 10 minutes later when winger Scott Malone had to be replaced by Liam Feeney with the Bluebirds already in a rampant mood.
Former Aston Villa defender Lowry made amends for his early lapse blocking a Bellamy effort inside the box while goalkeeper David Forde was forced to deal with a flurry of tricky deliveries in quick succession.
But they were showing no lack of firepower themselves follo...