Although nasal masses are uncommon in sheep and may have several causes, including
neoplasia and bacterial, fungal and viral infections, these lesions may lead to economic losses
resulting from weight loss and even death. It is therefore important to differentiate between
various categories of upper respiratory tract obstructions and lower respiratory tract infections.
The correct aetiological diagnosis of obstructive masses is essential for appropriate treatment and
management to be given or action to be taken. The presentation, clinical signs, treatment and
pathology of a case of suspected mycotic rhinitis in a 6-year-old Mutton Merino ewe, are described.