Remove the freezer meal from the freezer. There is no need to thaw.
Pour the BBQ sauce and water along with the frozen seasoned chicken breasts into the slow cooker. Cover with the lid.
Cook on LOW for 7-8 hours or HIGH for 4-5 hours, until the chicken is fully cooked and easily shreds with two forks.You can stir the sauce a few times whilst it cooks to prevent sticking if you prefer, but it's not necessary. Shred the chicken directly in the slow cooker using two forks.
Alternatively, remove the chicken and shred it using a stand mixer or hand mixer before returning it to the slow cooker and stirring it through the cooking juices.
Stir everything together until the chicken is coated in the BBQ sauce.
If desired, stir through a little extra BBQ sauce before serving.
Serve warm on hamburger buns, baked potatoes, wraps, rice bowls, or with your favourite sides.