The best approach for you depends on your age, physical condition, the underlying cause of the hyperthyroidism, personal preference and the severity of your disorder: 1  Radioactive iodine. 2  Anti-thyroid medications. 3  Beta blockers.  Surgery (thyroidectomy). If you're pregnant or otherwise can't tolerate anti-thyroid drugs and don't want to or can't have radioactive iodine therapy, you may be a candidate for thyroid surgery, although this is an option in only a few cases. In a thyroidectomy, your doctor removes most of your thyroid gland.
Fox squirrels have been known to live to 18 years old in captivity. Under natural conditions the average lifespan is 8 to 18 years old, though most squirrels die before they reach adulthood. Fox squirrels spend most of their time in trees during the day.
Compared to similar-looking rodents like mice and rats, squirrels are incredibly long-lived. The evolution of long life is thought to occur in animal species with low levels of predation,1 and squirrels fit the bill. Since they live in trees and are very quick and agile, squirrels are hard for predators to catch.