Yes. Duck is a fat-rich protein that works well as the muscle-meat base (70% of the ration in classic BARF, per Dr. Billinghurst's methodology). Rotate protein sources across the week — ideally 3–4 different proteins — for complete amino-acid and micronutrient coverage. Introduce each new protein gradually over 3–5 days to monitor for any digestive sensitivity.

Aim for 10% of the daily ration as raw meaty bones — roughly 18 g per day for an adult Cavalier King Charles Spaniel. Choose raw bones sized to the dog's jaw and never feed cooked bones (they splinter into dangerous shards). As recommended by FEDIAF, raw meaty bones provide calcium and phosphorus in a naturally balanced 1.2:1 ratio.

Small breeds like the Cavalier King Charles Spaniel have a fast metabolism and limited glycogen reserves. Split the BARF ration into 2–3 meals per day to prevent hypoglycemia, especially in puppies and seniors. One morning and one evening meal is the minimum recommended by FEDIAF. Weigh each meal precisely, as error margins are narrow on a small frame — even 10-15 g off can meaningfully impact daily intake.

Duck is a "novel protein" — few dogs have been previously exposed to it, making it an excellent choice for food allergies or intolerances. Its fat content is higher than chicken, so adjust quantities for sedentary dogs. Duck fat is rich in monounsaturated fatty acids. According to BARF methodology (Dr. Billinghurst, 1993), novel proteins are recommended in rotation to reduce the risk of developing new sensitivities over time.

Duck is a fat-rich protein — thaw it completely in the refrigerator and serve at room temperature for better digestibility. Fats oxidize faster, so consume within 24 hours of thawing. Frozen at -18°C, duck keeps 2–3 months without significant nutrient loss. Pre-portion into individual bags to streamline daily meal prep and avoid repeated freeze-thaw cycles.