The 20 year old was reportedly hit by team-mate James Morrison when he apparently refused to apologise for a mistake that led to Cardiff's late equaliser at The Hawthorns.
"I've been impressed with Saido, he's worked very well this week," said Mel.
"In addition to being an excellent player, he is also intelligent. He has shown this in training. And I'm sure he will continue to show this.
"I've spoken to him throughout the week. He is very positive. He will be important to us in the final seven games."
Mel did not want to elaborate on what happened in the dressing room last Saturday, saying only: "Eighteen young sports players have come in disappointed.
"It's normal they would argue among themselves. After that it's normal to have a beer and forget about it. The players were disappointed they hadn't won the game for the supporters."
One thing Mel was disappointed about was that the incident had found its way into the press.
He said: "The dressing room is the home environment. If any news gets out, that is bad news for us. What happens in the dressing room, should stay in the dressing room. I hope we have a positive reaction from this at Norwich."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball