Leave

Obtained at Level 35 by the beastmaster, Leave sends any pet away, aggro-free. It simply tells your pet that its services are no longer required.

As of the December 2005 update, a released pet will despawn if it is outside its normal spawn area.

• This means that releasing and immediately re-charming the pet in order to reset the charm timer may not always work (the pet might despawn before you have the chance to re-charm it).
• However this behavior can be used in order to change the level of mobs (e.g. if you're looking for a Decent Challenge mob but everything is Easy Prey or Even Match). Charm a mob, drag it outside its normal spawn range and release it. When it respawns it may have a different level.

• /pet "Leave" <me>