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==Signalment==
*Small breeds are predisposed
*German Shepherd
*Obese dogs
*Cats can also suffer from anal sac impaction
==Description==
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.
==Diagnosis==
===History and Clinical Signs===
*Excessive chewing or licking of around the anus and tail base.
*Pain on sitting
*Scooting
*Dyschezia
*Smell of secretion
==Treatment==
Compression and expression of the sacs by either internal or external forces. The sacs are situated at the 4 and 8 c'clock positions. Internal expression is more effective and desired with external expression reserved for small dogs and cats where it is not possible to place a digit in the rectum. If the contents are too dry, then a softening agent or saline can be placed inside to aid clearance.
==Prognosis==
Some cases may require regular expression but generally the prognosis is excellent. Certain cases may become chronic or infected and sacculectoimy may need to be considered.
==References==
Hall, E.J, Simpson, J.W. and Williams, D.A. (2005) '''BSAVA Manual of Canine and Feline Gastroenterology (2nd Edition)''' ''BSAVA''
Merck & Co (2008) '''The Merck Veterinary Manual'''