Directions:

Combine salsa, canned tomatoes, and taco seasoning.
Place onions & chicken in the slow cooker and top with tomato mixture.
Cook on low 7-8 hours or high 3-4 hours.
Remove chicken from slow cooker and shred. Return to slow cooker and stir in juices.
Serve in taco shells, on salads, pizzas or in bowls over rice!