This is one of the most common questions among pet parents and pet food manufacturers.
The best answer is that food acceptance does not only depend on the nutritional profile or quality of ingredients. It is also determined by the animal’s own biology: their feeding behavior, species-specific physiology, sensory memory, and oronasal perception, as well as the food’s texture and temperature.
One of the most common reasons for rejection arises when introducing a new diet—a phenomenon known as food neophobia. This can occur during diet transitions between life stages, when one or more key ingredients or coating components are changed, or even when there is a change in the shape or texture of the kibble. Neophobia is a natural protective reaction. Before tasting or chewing the new food, the animal smells it and compares the collected information with previous sensory experiences. If the diet’s profile does not smell familiar or appealing, it is very likely the pet will reject it.
Cats tend to be more reactive to these changes than dogs; since they’re obligate carnivores, their sensory system is specialized to identify high-protein sources. A number of comparative studies of taste receptors across species have shown that olfactory and umami taste receptors—found in both the oral cavity and other regions of the digestive system—respond primarily to compounds related to proteins and nucleotides. When these receptors are activated, they trigger hedonic responses in dogs and cats that encourage food intake and feeding enjoyment.
With this in mind, APSAPAL PET—available in both liquid and powder forms—offers a science-based solution. It is a natural palatability enhancer made from yeast-derived nucleotides and amino acids, specifically designed to stimulate umami taste receptors, thus improving food acceptance and mitigating possible neophobia reactions in pets. Due to its origin and composition, it is possible to incorporate it into single-protein diets or special diets for pets with sensitive conditions, maintaining high palatability without compromising the nutritional and functional objectives of the recipe.
