Darford Zero G Roasted Duck 12 OZ Sale! from $8.99 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. An ultra-premium oven baked, natural dog treat with zero grains, zero gluten, zero GMOs and they're low glycemic. Made with real meat, these limited ingredient treats are power packed with superfoods.