In the bottom of your slow cooker, add chicken thighs, yogurt, lemon juice, olive oil, garlic, allspice, paprika, cumin, oregano, salt and pepper.
Cook on low for 4 hours or on high for 2-3 hours.
When finished cooking, shred the chicken and stir it into the sauce until you’re ready to serve. Using a slotted spoon or tongs, remove chicken from the slow cooker, letting the liquid drain off, and add to pitas with tzatziki and diced tomatoes and cucumbers (optional).
Notes
If you use chicken breasts, cook on low and start checking them for doneness around 3 hours.