Mackay will be hoping to see the young Frenchman playing against Celtic at Cardiff City Stadium this week.
“Rudy is a young striker who has thrown himself into it this week,” said Mackay. “He’s a lovely lad, he worked really hard and there was good interplay with Robert Earnshaw at times.
“There is a rawness about him, but he did well and I will talk to Rudy and his advisors about staying with us longer. I would love him to agree.”