Wikia

Soothe Animal
Soothe Animal 40yd range 6% of base mana Instant cast Soothes the target beast, reducing the range at which it will attack you by 10 yards. Only affects Beast and Dragonkin targets level 85 or lower. Lasts 15 sec.
Usable by
Class	Druid
Properties
Type	Offensive, Utility
School	Nature
Cooldown	None/Global Cooldown
Talents
Improvement talents	Nature's Reach
Other information
Ranks	4
Related debuff
Magic Soothe Animal Reduced distance at which target will attack. Duration: 15 sec

Soothe Animal reduces the aggro radius of a beast or dragonkin.

Rank Table

Rank	Level	Levels affected	Cost
1	22	40 and lower	30
2	38	55 and lower	1 20
3	54	70 and lower	2 80
4	70	85 and lower	10

If it is resisted, you will aggro the target. Spell hit rating gear or talents may help prevent this.
Only usable on beasts and dragonkin.

This spell can be cast on a beast with stealth detection and will allow a rogue to Sap a nearby mob. This has been confirmed to work on the hellhounds in Hellfire Ramparts.

You can use this ability on mobs that patrol around a resource node (herb or mineral) and it will allow you time to gather and retreat; unlike Hibernate which will make you enter combat once the sleep wears off. If possible, enter Flight Form after casting Soothe to better your escape.

This can be used to prevent chain pulls if two beasts are close together. Cast on the undesired add before pulling. Some mobs have a combined aggro field and cannot be separated this way.

Another use is to mark targets for Hibernate, similar to how some mages once marked targets to be polymorphed with Detect Magic, prior to its removal from the game.

/ Patch 3.0.2 (14-Oct-2008): Can now be used on Dragonkin as well as Beasts. Is now instant cast.
/ Patch 4.0.1 (12-Oct-2010): Removed and changed to Soothe.