Did you ever think that only humans can get high blood pressure?  Cats and dogs can also suffer from hypertension.  Most of the time, they will never show any obvious signs of the disease.  The ability to recognize and to treat hypertension in dogs and cats is a relatively recent development in veterinary medicine.  Treatment for a pet with high blood pressure may include a low salt diet and pet medication to lower their blood pressure.  It has been found that in pets, hypertension is almost always secondary to some other disorder which may include diabetes, kidney disease or thyroid disease.  The chance of treating the hypertension really increases if you are able to discover and eradicate the underlying disease.