Tried it 10 yrs ago with a young (totally unsuitable!) horse that was getting more and more convinced that he was he one in charge. He tried to mug me for my bum bag of treats and lost the plot big time when I got on him in the school. frightened the life out of me. I have since read that you need different rewards for horses that are food oriented or play oriented. I think that, like all methods, to get it right taks hours and days and months and years of utter consistency & common sense. Oh and a sense of humour!
Helen Spence is very good. I personally don't use clicker training, but can see the benefits for some people. And I think it is more about the people than the horses in fact. But Helen is lovely, and like her thing says, Helen Spence - Horse Sense!!
I've used it on Daisy for a few things and it worked really well for things like backing up before I come into the stable and picking her feet up. For a good website look at
I use it all the time - it's transformed my concept of horse behaviour (and my behaviour) - but I'd already clicker trained my lurcher and I've spent the past 5 years going to courses to learn what to do.
holding clear boundaries, having clear goals and clear ways to attain them - and understanding what's going on - are crucial. If you can't do all that, then it's a very bad idea. If you can, it's transformative