Research overview: seasonal moulting and coat density changes with climate

Cat coats change with the seasons, and this overview reviews moulting and seasonal adjustment of the coat. Many cats grow a denser coat for cold months and shed it for a lighter summer coat, with moulting driven largely by day length and temperature, allowing the same animal to stay insulated in winter and avoid overheating in summer. The extent varies with species and environment. Researchers study moulting through observation and the physiology of hair cycles. Why it matters: seasonal coat change is a key part of thermoregulation, letting cats tune their insulation to the time of year, and it explains the heavy shedding familiar to owners in spring. Understanding moulting connects the coat to the seasonal demands of climate and shows how fur is a dynamic, adjustable system rather than a fixed covering.