Works on TBC expansion
First go and tame a beast.When you tame it lvl it up to 70.Then click on endurance training 5/5.Reset the talents.Then go attack a mob that needs several hits to be killed.When your pet attacks the mob run away till your pet dissapears.Then call it again.You will see that the pet has millions hp.Click on talent spirit bond in hunter's talents.Then your pet will regenerate 2% of total health every 2 secs.In other words 200k-500k hp every 2 secs.So you tank everything with this.