Yes you can use this same recipe to make sweet and sour chicken in a slow cooker! Place chicken stock, pineapple juice, ketchup, soy sauce, vinegar, honey and pepper in your crock pot. Whisk to combine. Add chicken breasts. Cover and cook on high power for 3-4 hours. Check the internal temperature of the chicken after 2 hours (done is 165°F). Remove from crock pot when it's done, cover and rest. Make a slurry of 1 tablespoon cornstarch with 2 tablespoons cold water and stir it into the liquid in the crock pot. Cover and let cook on high for 15 minutes or so, until the mixture thickens. Add the chicken back to the crockpot and stir to coat.