Managing perianal fistulas in dogs — a painful, debilitating immune-mediated condition.
Anal furunculosis causes severe, chronic welfare impairment that significantly reduces quality of life in affected dogs. The deep, foul-smelling ulcerations surrounding the anus cause constant discomfort — dogs spend hours licking the perineum, strain painfully during defecation, and may refuse food from systemic pain. The progression from small tracts to extensive circumferential ulceration occurs over months if untreated.
The welfare of affected dogs before diagnosis is often prolonged — the insidious onset and dogs' stoic nature mean owners may not recognise the severity until disease is advanced. The characteristic posture — tail tucked, hunched back, reluctance to sit — indicates significant pain that requires prompt recognition and treatment.
Ciclosporin has transformed the welfare outlook for anal furunculosis. Where previously surgical excision was the primary treatment (with significant post-operative morbidity), ciclosporin achieves complete or near-complete remission in the majority of dogs without the surgical welfare burden. Most dogs require 16+ weeks of treatment; some need long-term low-dose maintenance to prevent relapse.