Remove and discard skin and bones from the rotisserie chicken. Add meat to a large bowl.
Use two forks to shred the meat, or use a stand mixer fitted with the paddle attachment. Run the mixer on low speed.
Add seasoning and stir well to combine. Then stir in 1/3 cup of barbecue sauce.
Spray your casserole dish with non-stick cooking spray.
To assemble chicken sliders: Place bottom half of rolls or buns in the casserole dish. Add 1/3 cup of meat to each slider bun (2/3 cup for hamburger buns). Lay cheese slices over the shredded meat. Drizzle remaining BBQ sauce over each, then add tops of rolls/buns. Brush tops with melted butter.
Bake for 15-20 minutes, until sliders are golden on top.