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.
See if you have enough time to play with a ferret. Ferrets are social animals. They will not be happy if they don't have time to play with a human companion. A ferret is, by no means, a hands off pet, so make sure you can dedicate adequate time to playing with your ferret. Ferrets do sleep a lot. They tend to be sleeping for about 18 hours a day. However, during times when they are awake, they are very active and need a lot of stimulation.