Season the neck bones with seasoned salt, pepper, garlic powder, onion powder, and smoked paprika. Pat dry before seasoning so everything sticks well.
Brown the neck bones in hot oil for 2–3 minutes per side until lightly caramelized. This builds deep, savory flavor.
Build the slow cooker base by adding diced onion, bell pepper, celery, and garlic to the bottom of the slow cooker.
Layer the browned neck bones over the vegetables. Add chicken broth, Worcestershire sauce, and apple cider vinegar.
Add bay leaves, then cover and cook on LOW for 7–9 hours or HIGH for 4–5 hours until fork-tender.
Taste and finish. Remove bay leaves, skim excess fat, adjust seasoning, and serve warm with broth spooned over the top.