Shamelessly stolen from another forum which drew my attention to this site, sigh......
http://www.stopthathorse.com/index.htm
Of course the beauty of all these different gadgets is that as you shut off each option to the horse, he may well then find some other "unwanted behaviour" with which to show his feelings, thereby obliging you to buy the next gadget in the list. Genius!
Happy Christmas shopping, everyone!