<http://schema.org/articleBody>
"The anal sacs in cats, also referred to as &amp;ldquo;scent glands,&amp;rdquo; are basically pockets on either side of the anus, each of which is about the size of a pea. They are lined with glandular tissue that secretes a smelly discharge which contributes to territorial marking and is expressed during times of fear or anxiety.  Anal sac disease occurs when one or both of the two anal glands become inflamed, infected, abscessed, blocked or impacted with fluids that normally are expressed when the cat defecates (or &amp;ldquo;poops&amp;rdquo;).  This condition occurs rather frequently in both cats and dogs. However, cats tend to develop anal sac impactions, while dogs seem to be predisposed to developing anal sac infections or abscesses.  Impaction occurs when anal sac secretions build up in and become dried, hard and pasty."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.petwave.com/Cats/Health/Anal-Sac-Disease.aspx>