Abstract: The present invention identifies certain compounds, naturally present in raw meat, which are especially taste active in the dog. These compounds, which have been found to maximally activate taste neurons, are L-proline, L-cysteine, L-histidine, L-lysine, inosine 5'-triphosphate (ITP), inosine 5'-diphosphate (IDP), and adenosine 5'-triphosphate (ATP). Application of these compounds to dog foods in effective amounts can increase their palatability for dogs.