Chicken is so versatile and you can use all cuts in the crockpot including whole chicken, chicken wings, bone in chicken thighs, boneless chicken breasts, etc.
Once you remove the chicken from the fridge make sure to prep and get it in the slow cooker right away, as you do not want chicken to sit at room temperature .
As much as you might want to, it is not recommended to wash chicken before you cook it. You run the risk of contaminating your kitchen.
I highly recommend using a meat thermometer - The internal temperature needs to read 165°F for the chicken to be fully cooked.