I could take a raw sirloin away from any of the dogs I've had w/o a peep from them
You need to let the silly pup know you're the queen s@$% of sheba!! You are THE giver of all that is good and the ultimate source of retribution and consequence if the pup steps one inch out of line.
Let the pup know you're bigger, meaner, uglier and tougher than they are!!
Think drill sargeant!!!
Lots of different ways to do so, a loud angry voice will often work, in severe cases a scruff shake is sometimes needed. Or grabbing the scruff and holding the pup down on the floor. Which are the things a mamma dog would do anyway.
Don't put up with the BS or the dog will get more and more bossy and thats the last thing you want.