Mowbray refuted any suggestions that the 21-year-old had lost some of the sparkle which helped him net 16 times last season.
"I think it's a bit harsh to suggest he's not the player he was," Mowbray told the Birmingham Mail. "I think he is the player he was but we have moved up a level and you have to remember the quality we're up against.
"Of course he could do with a goal but we're now playing a division where the formation of the team gets adjusted a bit more than it did last season because of the quality of the opposition we're up against.
"There are a lot of factors that have brought our strikers to where they are but for me the overriding factor is that that are young strikers.
"I've still got great faith that we can create chances and the strikers will convert them."