Dogs with a fever will often have a warm dry nose. This does not mean, however, that all dogs with warm noses are sick. A nose can be dry or warm just because of the weather. If your dog has a warm nose but is alert and acting normally, he’s probably in perfectly fine health. So contrary to the popular myth about cold, wet, warm or dry nose, it isn’t a sign your pet is ill unless other symptoms are present, for example, loss of appetite, vomiting, diarrhea, or lethargy. If your pet has any of these symptoms it’s time to call the vet—regardless of how the nose feels!