* Moisture helps scent particles dissolve. A moist nose allows scent particles to dissolve, making it easier for the olfactory receptors in their nose to detect them. This is similar to how our tongues help us taste things better when they're wet.
* The nose is self-cleaning. The mucus on a dog's nose helps trap dust and dirt, preventing it from clogging their nostrils. The moisture also helps to wash away these particles.
* The nose is a temperature regulator. The blood vessels in a dog's nose can dilate or constrict to regulate their body temperature. This is why a dog's nose might be warm if they're excited or hot, or cold if they're relaxed or cold.
So, a wet nose is actually a sign of a healthy and functioning sense of smell, which is crucial for dogs!