Easy Slow Cooker Carnitas

Ingredients

• 1 (4-5 pound) pork shoulder, excess fat trimmed, cut into 3 inch chunks
• 1 cup chicken stock
• 1 medium white onion, thinly sliced
• 4 cloves garlic, peeled and chopped
• 1 Tbsp chipotle powder (or 1 canned chipotle in adobo finely chopped)
• 2 tsp ground cumin
• 1 tsp black pepper
• 1 tsp chili powder
• 1 1/2 tsp salt