Benefits of Cooking Some Ingredients in a Raw Diet

A raw diet for dogs does not need to be composed entirely of uncooked ingredients. In some cases, cooking specific foods improves nutrient availability, reduces antinutrient activity, or prevents potential deficiencies. Understanding the biochemical and microbiological effects of cooking allows for more precise diet formulation.

Eggs: Avidin and Biotin Balance

The egg white (albumin) contains avidin, a protein that binds strongly to biotin (vitamin B7), reducing its availability. In raw egg white, avidin remains active. Cooking denatures avidin, preventing this binding. If a whole egg is fed raw, the high biotin content of the yolk usually offsets the effect of avidin, making deficiency unlikely. However, diets high in raw egg white without the yolk may contribute to biotin deficiency over time. A practical approach is partial cooking, such as lightly poaching to denature avidin while preserving yolk nutrients.

Fish: Thiaminase and Thiamine Degradation

Certain fish species contain thiaminase, an enzyme that breaks down thiamine (vitamin B1). When fish is fed raw, thiaminase remains active and may lead to thiamine deficiency if consumed in significant quantities over time. Cooking inactivates this enzyme. Species such as carp, goldfish, and certain salmon varieties have notable thiaminase content, whereas others like trout and herring have low or no measurable levels. If raw fish is included in the diet, rotation of species and selection of low-thiaminase varieties is recommended. Additionally, avoid storing raw fish in direct contact with meat in the refrigerator, as thiamine degradation can occur during storage.

Vegetables: Cell Walls and Antinutrients

Cooking vegetables partially breaks down plant cell walls, increasing digestibility and nutrient absorption in dogs. Some vegetables also contain antinutritional compounds, such as oxalates in spinach, which can interfere with mineral absorption and contribute to urinary crystal formation in susceptible animals. Appropriate cooking methods, including steaming or boiling, can reduce oxalate content by up to 90%. Starchy vegetables such as sweet potato should always be cooked to gelatinise starch granules, improving digestibility and reducing gastrointestinal irritation. If vegetables are to be fed raw, mechanical breakdown via blending or puréeing can enhance nutrient bioavailability. Rotation among vegetable types, particularly leafy greens, reduces the risk of overexposure to specific antinutrients.

Integration into a Raw Diet

A nutritionally sound raw diet can include both raw and cooked components, depending on the food item and the dog’s needs. Cooking should be applied strategically to reduce antinutrient activity, improve digestibility, and protect against nutrient degradation, while preserving as much of the natural nutrient profile as possible.