Serum Iron. A serum iron test determines the amount of iron in the liquid portion of the blood. Because the amount of iron in the blood varies throughout the day, experts at Lab Tests Online recommend performing iron testing the first thing in the morning. A normal range for iron in the blood, as reported by MedlinePlus, is 60mcg/dL to 170 mcg/dL.
Today cats live longer than ever. Just 20 years ago the life expectancy of a cat was four to six years; today they live 15 years or more. Life expectancy in cats depends on many things, but the most important factor is whether he is an indoor-only cat or an outdoor cat.
The oldest cat recorded by the Guinness Book of World Records was one called Creme Puff, who was 38 when he died, and there are stories of others living even longer lives than this. This is quite unusual though, as an average cat life span is around 15-20 years. The kitten stage of a cat's life lasts from birth until puberty, which occurs from between six to eight months old. He's then considered a young adult up to the age of six.