This Irish Setter is not growling, he’s not threatening, that’s his smile.
His owner just says ‘Smile’ and he show his teeth. There is no growl, it’s a smile but only once per person. After that he’s done and he never ‘smiles’ again to that person.
The Smile: Vancouver, BC
“They” tried to get him on TV, during the rehearsals he did his “smile” but only once, so he never got to be on TV.