In reality, this isn’t true. Although a highly trained Veterinarian will use all the subtle information they can gather to piece the puzzle together there generally is very little information that can be gleaned from the status of a dog or cat’s nose. In addition, sometimes that information can be very misleading. For example, I have seen a pet have a very high temperature and suffering from pneumonia have a slightly damp and very healthy looking nose. The temperature and moistness of a dogs nose can even vary hour to hour or day to day and depends on the environmental temperature and humidity.