− | The most common disease of the anal sacs where the sac becomes impacted by a viscous, grey-brown secretion. It is caused by a failure of the sacs to empty normally during defecation, obesity, poor muscle tone and generalized seborrhea. The reatined secretion can encourage bacterial overgrowth and therefore infection and inflammation. | + | The most common disease of the anal sacs where the sac becomes impacted by a viscous, grey-brown secretion. It is caused by a failure of the sacs to empty normally during defecation, obesity, poor muscle tone and generalized seborrhea. The retained secretion can encourage bacterial overgrowth and therefore infection and inflammation. |