AH I forgot. I claim things, but wouldnt pull from their mouth as it can wind the dog up. My dog drops anything, luckily, it wasnt always so! Puppy theeth are sharp!

I step on things I want to have, ideally, when the dog is not focused on them, try a distraction first and then step on the ball till they give up. Treat and praise when he does. You must not let them have what is under your foot, give them something else if you have to in exchange.