I can't make a chihuahua into a rottweiler

And Di Canio believes his side need to develop a "nasty" streak if they want to be keep up with the promotion-chasing pack in League Two.   "Ritchie's moment was the picture of the game.  We are not a nasty team. And this is what makes me not very happy sometimes because we don't have a nasty player.  I don't know how much I can improve my team in this way.  With some players, if he has a chihuahua character I can't make a chihuahua into a rottweiler. He could be a proud chihuahua but he remains a chihuahua.   So many of the players at the moment are chihuahuas away from home - this is the truth."