Anal glands (or anal sacs) are relatively small glands found on either side of your dog's anal opening. Not present in humans, they are paired sacs located precisely just below the surface of the skin between the external and internal sphincter muscles, employed by nature to produce a particularly thick, foul smelling, oily liquid secreted by glandular tissue for identification and territory marking.
Prevention. Put your dog on a healthy diet and make sure he gets plenty of exercise. Small, obese dogs are at the highest risk of anal sac disease. Also, if you dog has problems with his anal sacs, have your vet check them at every checkup.
For chronic sacculitis, anal sac abscess, or anal sac rupture, your dog may need systemic antibiotics, such as Clavamox, Cephalexin, or Zeniquin. However, the antibiotics with the greatest benefit are those flushed directly into the anal sacs, such as Panalog or Animax.