In a large mixing bowl, combine Greek yogurt, finely chopped cucumber, lemon juice, chopped dill, garlic powder, and a sprinkle of salt and pepper. Stir until creamy and well-blended.

To the tzatziki base, add shredded chicken, finely chopped red onion, sliced kalamata olives, and crumbled feta cheese. Optionally, sprinkle in chopped parsley. Gently fold the ingredients into the tzatziki sauce.

Taste the salad and adjust seasoning if necessary by adding more salt, pepper, or lemon juice.

Chill the salad in the refrigerator for about 30 minutes or serve immediately.

Garnish with extra sprigs of dill or additional crumbled feta before serving.

Serve the Tzatziki Chicken Salad with Olives with warm pita or over a bed of mixed greens.