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.
In addition, ferrets are unable to digest the high levels of carbohydrate in dog food. They need to get most of their calories from simple carbohydrates, protein, and fat. Ferrets have such a short intestinal tract they can't eat very much at a time, and therefore need a concentrated diet.