Many people grow up believing that you can diagnose a dog’s health by his nose. You might think that if your dog’s nose is cold and wet it means that he’s healthy. Or, if his nose is warm and dry it means that he’s sick. Well, the answer is yes and no… Or, not really. The basic answer is that your dog’s nose will be wet or dry at different times, depending on when you touch it, what he’s been doing, the environment around him, and so on. It’s hard to get a standard reading on a dog’s nose. Your dog may lick his nose to moisten it.