Prep your slow cooker by spraying it with non-stick cooking spray.
Add the chicken breasts to the bottom of the slow cooker in an even layer.
In a small bowl, stir to combine the cayenne pepper, paprika, and garlic salt.
Sprinkle this seasoning and brown sugar over the chicken breasts. Top with the honey, vinegar, and pats of butter.
Cover and cook on LOW for 4 hours or HIGH for 2 hours, or until the chicken is cooked through (reaches an internal temperature of 165 degrees Fahrenheit) and shreds easily.
Once cooked, shred the chicken using two forks. Place the chicken back in the slow cooker and stir to combine the chicken with the sauce.
Serve on soft buns with pickle slices.
