A wet nose is the mark of a happy, healthy pup, but is perfectly normal for your dog’s nose to go dry from time to time. Consider your dog’s nose like the human hand: dogs use it to investigate the world around them and it’s always the first part of their body that initiates contact. Hydration, sunburn, wind and body temperature can all affect moistness. If the nose stays dry for an extended period of time and you see chapping start, a simple application of lubricant should help your dog.