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Animals become so distressed by the presence of flies swarming around them, particularly their head and eyes, that they will eat less and therefore have a reduced weight gain and there will be production losses. Animals may move suddenly and try to escape them, causing self trauma. This may then predispose to [[Blowfly Strike|blowfly strike]], secondary bacterial infection and other conditions.
Animals become so distressed by the presence of flies swarming around them, particularly their head and eyes, that they will eat less and therefore have a reduced weight gain and there will be production losses. Animals may move suddenly and try to escape them, causing self trauma. This may then predispose to [[Blowfly Strike|blowfly strike]], secondary bacterial infection and other conditions.
== Signalment ==
== Signalment ==
Any animal or any breed, age or sex can be affected by fly worry, particularly so if the environment is unhygienic.
Any animal or any breed, age or sex can be affected by fly worry, particularly so if the environment is unhygienic.
== Clinical Signs ==
== Clinical Signs ==
Production losses, reduced weight gain, reduced milk yield and notable signs of fly worry such as tossing of the head, sudden movements and reluctance to eat. There may also be signs of self trauma such as 'broken head' in sheep and other abrasions on the animal.
Production losses, reduced weight gain, reduced milk yield and notable signs of fly worry such as tossing of the head, sudden movements and reluctance to eat. There may also be signs of self trauma such as 'broken head' in sheep and other abrasions on the animal.
== Diagnosis ==
== Diagnosis ==
Clinical signs and visualisation of flies on the animal or around the animal.
Clinical signs and visualisation of flies on the animal or around the animal.
== Treatment and Control ==
== Treatment and Control ==
Fly control on the host is imperative and a wide range of products are available in pour on or spot on forms and even as insecticide impregnated ear tags. These products have nil or short withdrawal periods, which is needed for milking animals or animals going for slaughter.
Fly control on the host is imperative and a wide range of products are available in pour on or spot on forms and even as insecticide impregnated ear tags. These products have nil or short withdrawal periods, which is needed for milking animals or animals going for slaughter.
{{Learning
|flashcards = [[Sheep Medicine Q&A 08]]
}}
== References ==
== References ==