Perianal fistulas or anal furunculosis is a chronic, progressive disease characterized by ulceration of the perianal tissue (tissue surrounding the anus) in the dog.
For some great information and resources, please go to:
Canine Perianal Fistula or Anal Furunculosis site at Critterology
or visit the Tripod support group site that has very extensive information and a support group
