sheep with a nervous twitch

[spanners and hammers]

got two easycare sheep keeping the alpaca company ,,, one has but not all the time started putting its head down and jerkly stamping its back legs been on and off for a few days but more on sunny days ? no change in diet and no strange plants in the paddock that have not been there in the last year they have been in it seem bright and happy ,, any ideas ,,,,,,,

 

[Cowmansam]

Sheep with a nervous look any welshmen been about ?

 

[Al R]

Midges and flies, my ewes in the shed always start doing it from late March onwards they all cowar against the walls with their heads down then run and jump around always put it down to when more midges and flies are around - flies in the eyes on back roads etc?