We have two young stallions at work. The younger one is two years old and currently being a bit of a sod to handle. A local man has told us that an old french trick is to heat up a jacket spud to boiling point and when the horse lunges for you with teeth bared - ram it in his mouth.
As previously our only form of protection was our voice and occasionally a whip we did consider this but were having a hard time coming to terms with the possibility of causing physical damage.
The other stallion who is three now is a nicer character, but still has his moments. His favourite trick is to grab the lead rope or lunge line so that your control is considerably lessened. Opening the fridge yesterday I noticed a tube of harrisa (chilli) paste sitting on the shelf and this bought a wicked smile to my face.
I went back to work and smothered the lunge line (a long rope used when you exercise a horse) with the paste. As usual he grabbed the line briefly before spitting it out and pulling a variety of odd faces.
Every so often he obviously forgot and went to grab the line before remembering and dropping it (like a hot potato?!!!)
I did feel marginally guilty when he got back in his box and started drinking like he had had a vindaloo.......