OC Raw Additions Frozen Raw Duck Livers for DogsDuck liver should be fed in moderation around 5% of their raw diet at a time as it can cause digestive upset if fed in large quantities. Also, too much duck liver may lead to copper toxicity. Please note: our liver is sourced from a reputable supplier to avoid contamination with harmful substances Manage the same way as any raw product, cleaning feeding bowls, work surfaces, and utensils after serving. Always wash your hands after handling raw products