The characteristic of plants or plant parts that elicit a selective grazing or browsing response by animals "Palatability" is controlled by the plant factors of chemical composition, proportion of plant parts, growth stage, external form of plant parts; influenced by environmental factors such as slope steepness, wind, sun or shade; and the animal factors of instinct, learning, physiological state, individual behavioral pattern variations and animal sensory responses
Sensory attributes of foods, (e g , aroma, flavor, texture, etc ) which affect their acceptability