ST
A similar thing happened with the cows in South Wales after several of these 'sightings' by a Farming Family
The cows seemed to end up in the wrong field after each 'fly by' which happened on several occasions.
They put it down to a loose gate at first but they realised after making the gate more secure the cows would have had to unlock the gate, lock it behind them, walk down the lane, past the farm where they lived, open another gate and close it behind them. All in the middle of the night! Apparently there were no imprints of the cows hooves in the mud although it was wet at the time.
Unless the cows were expert hangliders it does boggle the mind.
Robert