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.
Statistically, the life span of an indoor cat averages 12 to 14 years, whereas it is only about four years for the indoor-outdoor cat. Yes, you've read that correctly. A cat's life span can be seriously curtailed by allowing it to come and go at will.