Does a cold, wet nose mean the dog is healthy? – This is not entirely true. Yes, a dog's nose is often cool and moist, but this does not necessarily indicate health. It is possible for an ill dog's nose to feel this way, and it is possible for a healthy dog to have a dry, warm nose. More appropriate meters of your pet's health are his appetite, energy level, and overall comfort level. If you are concerned about your dog's temperature, rather than feel his nose, it is best to use a thermometer and take the temperature rectally.