Cats and dogs that are not spayed are susceptible to a uterine infection called pyometra. It is commonly diagnosed in most veterinary practices. After a cat's or dog's oestrus (heat) cycle, the uterine lining becomes less able to fight off colonization by bacteria, and can rapidly lead to a severe infection. Pyometra literally means 'uterus of pus.' Gross. And dangerous: These pets often are brought to hospital for generalized lethargy, malaise, fever, lack of appetite, and excessive thirst. In severe cases, these dogs and cats are often septic (bacteria in the blood) and in shock. These cases must be handled as a medical emergency. ...
