Serving Size Tip : My kids don't eat a whole chicken breast so I usually cut each breast in half (I end up with 8 smaller pieces, not thinner pieces so don't cut horizontally) and that way it's easier to serve from the crockpot. Some of my kids will eat two pieces while the younger ones just want one piece. If the chicken is cut in half, it probably won't need as long to cook - maybe on the shorter end of the cook time (4-5 hours).