Dogs and cats over the age of 7 are considered seniors. Our older pets need a little more medical attention than a younger pet to help maintain their health and vitality. In addition to the yearly exams and staying current with vaccines and parasite control, bloodwork should be done at least once a year. Early detection of many diseases is the key to battling illness. Blood tests should be performed that include chemistry values, thyroid levels and a complete blood count. The chemistry values take a look at the function of several major organs, including liver and kidney and can help detect a problem long before your pet ever shows signs of illness.