[Miabella]

I try to use these times as a teaching opportunity rather than getting adversarial. Using a trade at this point is a good way to go with something she shouldn't have, I would call her to you and ask her to show you the neat thing she has. She is likely quite proud of herself and will be eager to show you, especially if she knows you have a treat and make a big deal out of how good she is to bring it to you.

Then, you need to start teaching a release command with objects that she is allowed to have. Make it a big game, starting with low value objects and working your way up. At first you should immediately give her back the object she gives up as a reward. Be sure to be very generous with your praise, she will think that outing an object is the most fun game in the world. You can then move to a delayed reward, like running to the kitchen for a treat.

This system has worked beautifully for us. For example, Ilsa spit out half a ham sandwich somebody had left on the sidewalk and I didn't see. That was worth all the treats in my pocket plus a little impromptu tug game on the sidewalk.