In a large bowl, combine ground chicken, breadcrumbs, Parmesan cheese, minced onion, garlic, and egg.
Add salt and pepper to taste, and mix lightly until evenly combined.
Shape the mixture into 1-inch meatballs and place them in the slow cooker.
In a separate bowl, whisk together Buffalo sauce and honey until well combined.
Pour the sauce over the meatballs in the slow cooker, making sure they are well-coated.
Cover and cook on low for 6-7 hours or on high for 3-4 hours.
Once cooked, serve warm with extra Buffalo sauce if desired.