Place the chicken breasts in a slow cooker and pour the barbecue sauce over them. Cook on low for 6-7 hours or high for 3-4 hours until the chicken is tender and easily shredded.

Once cooked, remove the chicken from the slow cooker and shred it using two forks. Return the shredded chicken to the slow cooker and mix it with the remaining barbecue sauce.

While the chicken is cooking, toast the burger buns in a toaster until golden brown.

Spoon a generous amount of the BBQ chicken onto the bottom half of each toasted bun. Top with coleslaw and pickles if desired, then place the top half of the bun on each sandwich.