... muzzle, fetlock and girth.
A mysterious dark horse has appeared today in the Students' Union, part of an advertising campaign, the advertising agency spokeswoman explained further:
"The horse is in progress across campuses nationwide, its purpose is yet to be revealed."
The next step for the agency is to associate the website http://www.adarkhorse.com with the travelling horse.
Have a look, if you can work out the puzzle on the site then all will be revealed.