I don't usually step into threads like these since I'm a relatively new rott owner, but tossing a cookie in the middle of 2 male dogs and letting your rottie approach the cookie is the absolute dumbest idea I've ever heard!
What were you thinking??? Do you want your boy to get hurt? Do you care if he dies? Because from the sounds of it, you really don't care.
I'm sorry if I'm coming across as harsh, but this is an animal YOU decided to bring into your life and your home. It's YOUR responsibility to protect him and nurture him and give him a loving enviroment free from fear and possible attack.