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 the wild: ferrets are obligate carnivores, which means they eat a mostly carnivorous diet of other small mammals, such as rabbits, possums, hedgehogs and rodents. They also eat birds, bird eggs, reptiles, fish, amphibians and invertebrates. Wild ferrets may also eat carrion. At the zoo: commercial ferret chow.