Objectives Canine chronic idiopathic rhinitis is a common cause of nasal disease in dogs but data reporting outcomes following treatment is lacking. The aim was to describe pre‐ and post‐referral management and outcomes of dogs diagnosed with canine chronic idiopathic rhinitis at a single referral centre. Materials and Methods Retrospective review of medical records (signalment, clinical signs, treatments prior to referral, investigations, response to therapy and outcomes) of 75 client‐owned dogs diagnosed with canine chronic idiopathic rhinitis between December 2018 and 2023. Results Forty‐one males and 34 females were included. Duration of clinical signs prior to referral was 104 days 3 to 1954 and only 11/75 dogs had not received antibiotics. Tomography revealed destructive rhinitis in 54/75 dogs. After referral, the most common first‐line treatment was non‐steroidal anti‐inflammatory drugs (46/75). Sixty‐seven cases were followed up for 237 days 14 to 1701. Forty‐six, 25 and 13 dogs underwent a second, third and fourth treatment trial, respectively. Antibiotics were the most used second trial agent (25/46), and corticosteroids the most common third (16/25). Outcomes were available for 63 dogs. At final recorded contact, 14/63 cases were in remission, 38/63 were considered improved, 9/63 had static disease and 2/63 had worse disease. Three cases were euthanased due to canine chronic idiopathic rhinitis. Non‐steroidal anti‐inflammatory drugs were significantly associated with clinical improvement after initial treatment trial (OR: 3.0, 95% CI: 1.1 to 8.5; P =.04). Clinical Significance Dogs diagnosed with canine chronic idiopathic rhinitis received variable therapies, including frequent antibiotics. Administration of non‐steroidal anti‐inflammatory drugs as first‐line treatment was associated with improved outcomes in this cohort of dogs.
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