I was worried about this. My Rottweiler (who easily weighs more than me) hates dudes of any species. He tolerates some, mostly ones that he has to, like my brother.
Then again, I haven't started T yet, and might not for a few years... and unfortunately, with his size he doesn't have a great expected lifespan. So, even though this alternative blows more, it might not even be an issue by the time I start.