Slow Cooker Chicken and Dumplings

Chicken (4 boneless and skinless breast)

Butter (2 tbsp)

Cream of chicken soup (2 cans)

Onion (1 finely diced)

Carrots (diced, 2 cups)

Chicken broth (1/2 cup)

Refrigerated biscuit dough (2 packages torn into pieces)