Do you cook diced chicken before you put it in a slow cooker?
no. dicing chicken before putting it in a slow cooker can over cook the chicken.
Yes, frozen raw chicken should be defrosted before cooking. It won't cook evenly if frozen and there is more chance of pathogen growth. ================================= Another perspective According to the United States Department of Agriculture, chicken should be thawed before cooking in a slow cooker or a microwave. Chicken may be cooked from frozen in a regular oven or on the stove, but plan on increasing the cook time by 50%.