Why cats stop eating—it's not just fullness
by Iwate UniversityGaby Clark
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Why do cats often leave food unfinished? Many cat owners have experienced this puzzling behavior. Domestic cats are well known for eating multiple small meals throughout the day, a pattern thought to reflect their evolutionary origin from the African wildcat (Felis silvestris lybica), a solitary hunter that repeatedly captures small prey. It has also often been assumed that cats leave food unfinished simply because they have a small appetite or a capricious nature. However, the mechanism underlying this characteristic feeding pattern has remained unclear.
A research group led by Professor Masao Miyazaki at Iwate University, Japan, has now shown that domestic cats may stop eating not only because they are full, but also because smell plays an important role in regulating feeding motivation. The study suggests that feeding behavior in cats is dynamically influenced by olfactory habituation and dishabituation. The study was published in Physiology & Behavior.
In a series of controlled feeding experiments, cats were given food in six consecutive cycles, each consisting of a 10-minute feeding period followed by a 10-minute interval. The researchers found that when the same food was repeatedly presented, cats gradually reduced their food intake over successive cycles. In contrast, when different foods were presented sequentially, the decrease in intake was significantly attenuated.
In further experiments, the researchers tested whether the decline in intake caused by repeated presentation of the same food could be reversed by introducing a different food. Cats were given the same food for five consecutive trials and a different food in the sixth. Intake decreased significantly from the first to the fifth trial, but increased again when a new food was introduced, regardless of whether it was more or less palatable than the original one.
Remarkably, even without changing the food itself, simply introducing the odor of a different food restored intake. The researchers also found that continuous exposure to the same food odor between feeding cycles led to a further reduction in subsequent food intake. However, this effect was mitigated when a different odor was introduced during the intervals.
"These findings suggest that cats do not stop eating simply because they are full. Rather, their feeding motivation decreases as they become accustomed to the smell of the food, and it can be restored by introducing a new odor. Sensory novelty, especially olfactory novelty, can reactivate feeding motivation in cats," says Professor Miyazaki.
This study provides the first experimental evidence that odor-dependent habituation and dishabituation may help explain the characteristic pattern of frequent, small meals in domestic cats. Beyond advancing our understanding of feline feeding behavior, the findings may also have practical implications. They could help inform new feeding strategies for cats with reduced appetite, improve nutritional management for aging or sick cats, and support the development of pet foods designed with olfactory variation to help maintain feeding motivation.
More information
Takumi Takahashi et al, Olfactory habituation and dishabituation dynamically regulate feeding motivation in domestic cats, Physiology & Behavior (2026). DOI: 10.1016/j.physbeh.2026.115328
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Provided by Iwate University