Dealing With Aggression In Your Yorkshire Terrier

I tried to take a toy away from my Yorkshire Terrier and he astonished me by growling in protest.
This display of aggression upset me but I knew I had to show my Yorkshire Terrier who was in charge. I took him by the collar and without saying a word to him; I led him to his timeout room and shut the door behind me.
There was no reason to speak to him, by showing that I was displeased and banishing him, he was able to be alone and understand the gravity in his mistake.
I waited about ten minutes and then I opened the door and invited him to come back into my living space.