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.
Veterinary medicine has made some great advances in recent years, and this is one of the reasons the average age of domestic cats is increasing. A well cared for cat that is kept indoors and is fed a good nutritional diet, would be expected to live for about 15 years. Some cats do live to 20 plus years and there are records of a few cats reaching over 30 years. These sort of ages for a cat are very much the exception however. The genetic make up of a cat can be a factor in determining its life span, some breeds of cat appear to be more resilient than others.