Kong Stuff'n Easy Treat - Peanut Butter Recipe 8oz Kong Sale! from $6.32 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Vitamin enriched kong liver and peanut butter pastes make kong stuffing easy. Simply apply to inside surface of a kong toy or grooves of a kong dental toy. Keeps dogs busy and content.