Fed up fans have cruelly dubbed him a sheep in wolf's clothing after just one goal and only four shots in 14 Premier League games so far this season.
Hughton said: "It's frustrating for him because he is used to scoring goals regularly and playing well in most games.
"Sometimes it just takes people time to settle in at a new club and some players need more time to adjust than others.
"But in terms of what he is bringing to the team - his work rate and his commitment - I simply cannot fault him.
"He works hard and he trains really hard every day and I think it's just a question of confidence now. Just one goal would make the world of difference for him.
"But we signed him for a lot of money and he is an integral part of what we are trying to achieve here at Norwich."
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