Mix broth and spices:
In a slow cooker bowl, combine chicken broth, paprika, salt, pepper, diced onion, and minced garlic; whisk until mixed.Coat chicken breasts:
Place chicken breasts into the liquid and flip to coat evenly.Cook until tender:
Cover and cook on low for 6 hours or on high for 3 hours, until the chicken is fork-tender.Shred chicken:
Using two forks, shred the chicken directly in the slow cooker. Alternatively, transfer chicken to a bowl and shred with forks or a stand mixer.Simmer to absorb juices:
Set the slow cooker to low and let the shredded chicken simmer for another 30 to 60 minutes to absorb the juices. Adjust salt and pepper to taste.Serve warm:
Serve immediately while warm.