Had you had her long? Sneezing can be a sign of respiratory disease, but it also can be nothing. Respiratory diseases such as infectious bronchitis, ILT, or mycoplasma would have more symptoms--watery eyes, nasal drainage, sometimes rattles or wheezes when breathing, and sometimes swelling around the eyes or face. A history of symptoms is always helpful for the vet doing a necropsy. They may also be able to tell you if there are any diseases currently present in your state.