Prep the slow cooker: Lightly grease the crock with avocado oil spray or a touch of butter to prevent sticking.
Mix the meatball base: In a large bowl, combine ground chicken, eggs, Parmesan, almond flour, ranch seasoning, garlic powder, onion powder, salt, pepper, and parsley. Mix gently with your hands or a spatula until just combined.
Avoid overmixing to keep them tender.
Form the meatballs: Scoop about 1 1/2 tablespoons per meatball (a small cookie scoop helps). Roll lightly with damp hands and arrange on a parchment-lined sheet as you go.
Quick chill (optional but helpful): Place formed meatballs in the fridge for 15–20 minutes to firm up. This helps them hold shape in the slow cooker.
Make the buffalo-ranch sauce: In a small saucepan over low heat, melt the butter.
Stir in buffalo sauce and 2 tablespoons ranch dressing. Taste and adjust salt or heat if needed.
Load the crockpot: Pour a small layer of sauce into the bottom of the slow cooker. Add meatballs in a single layer (a little overlap is fine).
Pour the remaining sauce over the top, coating well.
Cook low and slow: Cover and cook on Low for 3–4 hours or on High for 1 1/2–2 hours, until meatballs reach an internal temperature of 165°F and are set but still juicy.
Finish with ranch: Stir in the remaining 1 tablespoon ranch dressing for extra creaminess, or drizzle over the top before serving.
Garnish and serve: Sprinkle with chives or blue cheese. Serve with celery sticks, cucumber slices, or over cauliflower rice.