In a large mixing bowl, combine shredded cooked chicken, finely chopped onion, and diced dill pickles. Stir until evenly mixed.

In a separate bowl, whisk together Greek yogurt, mayonnaise, relish, mustard, and chopped chives and dill until smooth.

Gently fold the creamy dressing into the chicken mixture, ensuring everything is coated evenly.

Taste and adjust seasoning with salt and pepper as needed.

Cover the bowl or transfer to an airtight container and refrigerate for at least 2 hours to enhance flavors.

When ready to serve, gently stir and scoop portions onto toasted bread, in lettuce leaves, or enjoy with crackers.