This explains why it's impossible to make pacemakers with replaceable batteries. 1  Sinus bradycardia is a common reason for needing a pacemaker. Read about sinus bradycardia. 2  Read about sick sinus syndrome. 3  Read about heart block.
What Do Ferrets Eat in the Wild? Dark-footed ferrets depend on prairie dogs for everything from food to shelter to safety. These wild members of the weasel family eat prairie dogs practically exclusively and also live in abandoned prairie dog dens. They rely on these large holes for protection from eagles and other predators.
1 Female ferrets usually weigh anywhere from 1-3 pounds. 2  Depending on how much your ferret eats, he/she may weigh more or less. 3  The length varies in different ferrets, but most ferrets are about 15 inches from their nose to the tip of their tail. 4  Domestic ferrets reach their adult size at one year old.