In order to keep a keen sense of smell, they are indispensable for everything. If the inhaled air is humid, cats and dogs will feel the smell more easily.
There are many tiny particles floating in the air, which are the source of odor and will enter the nose with breathing. In order to smell the smell in the air, the tiny particles that make up these smells will be adsorbed on the mucosa in the nostrils. If the mucosa is wet, tiny particles are more likely to be adsorbed on it.
Therefore, the noses of cats and dogs will naturally secrete some water to make their noses moist. When the weather is hot, they often lick their noses with their tongues to keep them moist.
It may be caused by the indoor environment. If the nose and hair are dry for a long time, it is sick. If it's only occasionally, don't worry. Maybe your home is very dry. Buy a humidifier. The optimum environmental temperature for cats is 15-25 degrees, the optimum environmental humidity is 45%-55%, the temperature is 38-39.2, the number of breaths is 20-30/min, and the heartbeat is 120- 140/min.