If your dog is middle aged or older, it may be suffering from an overproduction of cortisol. One of the most obvious signs of this disease is panting. Luckily, this disease can be cured, and panting will eventually let up when that happens. As with any other health issue, Cushing's disease can only be properly diagnosed by a vet. If excessive panting appears randomly with no specific cause, such as heavy exercise or stress, a vet trip is necessary for testing, examination, and other diagnostic procedures. If your pet has Cushing's disease, you can work out a health plan to ensure your pet lives a happy and healthy life.