this is VERY simple to do, all you have to do is use an ability on your pet ( I.E bestrial wrath or shell shield ) that has a duration, then put the pet in the stables.
you need to leave the pet there for a very long time if you want it to build up
before i sold my hunter i used to do this with bestial wrath then go marksman
original thread here http://www.mmowned.com/forums/wow-ex...-tank-bug.html im just explaining it