I didnt really know where to put this so I thought I should put it in here.
I was up my friends stables, we put her horse to bed and stuff.
And my friend started to whistle.
I asked her what she was doing, and she said it makes her horse wee.
And what happened next? Her horse started to wee.
Any suggestions on to HOW this works?
Or is it just a random thing the horse has learnt to do?!