Free access to food promotes overweight because it removes the natural constraint that limits food intake: without set mealtimes, an inactive cat nibbles out of boredom or habit and consumes more calories than it burns, whereas a very active cat spontaneously regulates its meals and stays lean with the same feeding method.
A mechanism that depends on the cat's profile
The wild cat or very active cat hunts and moves around a lot; its metabolism burns most of what it eats, and free grazing presents no problem. In contrast, the neutered indoor cat sees its energy requirements drop by roughly 20 to 30 percent after surgery, while its confined territory limits physical activity. In this setting, a bowl that is always full becomes a source of calories available without effort, and eating behaviour shifts from actual need towards occupying itself or anticipating stress.
Free-feeding is not bad in itself: it is whether it matches the animal's activity level that determines the risk. A cat that goes outside, hunts, or plays several hours a day can self-regulate; a confined, sedentary cat with no mental stimulation statistically has more difficulty stopping at the right time.
Measuring the portion and assessing body condition
To prevent problems, the daily portion recommended on the packaging should be weighed or measured with a measuring cup rather than estimated by eye, then placed in a bowl or feeder, with or without free access depending on the animal's profile. Regular assessment of body condition allows adjustment: in a cat of correct weight, the ribs should be palpable under a thin layer of fat without being visible, and the waist should be clearly defined when viewed from above, just behind the ribs. An absent waist or ribs that cannot be felt under finger pressure signal overweight that warrants a veterinary opinion to adjust the feeding method.
