All Feline Hospital Files - 'Impacted Anal Sacs'http://allfelinehospital.evetsites.netPathophysiology: Cats have two anal sacs on either side of their anus that sit right around 4 and 8 o'clock. These sacs have multiple oil glands that empty into them continuously. The oil that these sacs fill up with is very potent smelling, and helps cats to identify each other by smell.Impacted Anal Sacs on the title to the left to download a printable pdf version of this handout.file/40848/Impacted Anal Sacs