Learn the "leave it" command.
Worked with Sadie 4 sessions, approximately 5 mins each on the leave it command. She is responding well to it. The first three sessions, I used boiled chicken. In one hand I showed it to her and marked with "Yes" when she turned her attention elsewhere. Then gave her a piece of chicken with my other hand. By the third session, I could place a piece of chicken in front of her on the ground, and she would look at it, then look up at me with eye contact. The last session, I used two tennis balls, using the same methods with the chicken. Again, she responded well to the "leave it" command. When I gave her the ball as a positive reinforcement, she "dropped it" on command.
Reinforce the same behavior by repeating the training the same as I did today, with no distractions.