It is essential to identify the underlying cause of feline diarrhea before an appropriate and effective treatment protocol can be developed. In many cases, the source of the problem can simply be removed or avoided – such as removing dietary ingredients that are not well tolerated by a particular cat – and the diarrhea will quickly resolve. If the cause is not readily apparent, the attending veterinarian has a number of diagnostic and management tools available to treat affected cats. Cats become dehydrated very quickly when they lose water through prolonged bouts of diarrhea. If the problem persists for more than 24 hours, the cat should see a veterinarian. The owner should bring along a fresh fecal sample, if at all possible.