Indirect pitbull attack

<backstory>
A friend to the family has recently become a tilesetter, and eager to do some work to add to his portfolio, he wished to put tiles in my parents guest toilet. </backstory>
With that said, he has a dog that he can’t leave on its own for too long, so it gets to come along with him. The other day I had the surprise pleasure of meeting this dog. Such a lovely dog! She is much different from the dog I grew up with, mostly in that this dog will eat anything! She was absolutely crazy about rabbit treats. Speaking of rabbit treats, Harry had to be locked up on the upper floor, which he didn’t mind all that much since he usually likes to hang around on the upper floor in the daytime anyway. But let me tell you what happened when I went upstairs to say goodbye to him when I was leaving!  I reached down to pet him as usual, but instead of lowering his head to receive my affection, he dodged off! I followed him, gently talking to him and asking what’s the matter, and when I reached out my hand again he attacked me! He was extremely upset at me reeking of dog, I don’t even think he recognised me. We have discussed before that Harry seems to recognise people by scent and be wary before he gets to smell them, and this clearly proves it. He thought I was a dog! I wonder had he attacked the pitbull if he had the chance? He did leap towards it the first time it was visiting, and he tends to attack people he doesn’t know. Seeing how the pitbull treated the glove i gave it to play with, I dread the thought of the outcome of that fight! 
Harry! You have to be more careful. You’re big, but you’re not invincible!
I kissed a dog and I liked it

Invincible Harry