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and balanced diets, they are commonly used as supplements to improve acceptability of dry foods for feeding during more stressful situations. Although additions of canned food, milk, meat, eggs, or broths invariably improve palatability of dry foods, the nutritional value of properly balanced dry foods may not always be enhanced.

Formulas for examples of products representing typical dry, semimoist, and canned foods are presented in Table 11 (see p. 62). These examples are intended only as illustrations of formulations from commonly available feed sources.

Formulation for semipurified foods as commonly used in nutrition research may be found in any number of publications relating to vitamin and/or amino acid requirements of dogs (see References). Such diets frequently contain crystalline amino acids, casein, or isolated soy protein as the sole protein source, depending upon the nature of research being conducted.