According to my friend, all the clinical signs I was talking about are normal signs – nothing to worry about. What are nasal botsThe adult nasal bot fly is grayish brown and about 12mm long. Nasal bots are larval stages of the sheep nasal bot fly (Oestrus ovis). While clinical signs may go unnoticed, the economic effects of nasal bot flies may include slow growth rate and poor fleece. Infestation with nasal bot flies will also predispose the sheep to other secondary bacterial infections that result in sinusitis.

Source: Standard Digital June 04, 2022 10:15 UTC