Perianal Fistula in Senior German Shepherds

Updated: May 2

Perianal fistula, also known as anal furunculosis, is a serious medical condition that causes chronic inflammation and ulcerative, tunnel-like lesions of the perianal tissues surrounding a dog's anus. It starts as tiny holes in the dog's skin in the anus area and then evolves into deep tunnel-like lesions until the anus is consumed entirely. Perianal fistula is relatively common among senior German Shepherds. In fact, of all diagnosed canine perianal fistula cases, 80% are middle-aged and older German Shepherds, and most are male. Unfortunately, many German Shepherd owners are unaware of this progressive and painful disease until it's progressed.

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