Mix flour and ranch seasoning mix together in large zipper baggie.
Cut chicken in large chunks - I did 5-6 chunks per chicken breast.
Add chicken breast pieces to zipper baggie and shake until all chicken pieces are coated.
Dump chicken into crockpot sprayed with cooking spray.
In a medium bowl, combine barbecue sauce and water until mixed well. Pour over chicken.
Cook on low 4 hours. Serve over rice and enjoy!
