Avoidance is a passive summoned pet ability that decreases damage taken by AoESpells and effects by 90%.
Patch 3.3.0 (08-Dec-2009): Now reduces the damage your pets take from area-of-effect damage by 90%, but no longer applies to area-of-effect damage caused by other players. Doomguards and infernals now innately have Avoidance like all other warlock minions. AoE damage reduction increased from 80%. Previously, hunters had to spend pet talents to get this ability for their pets. It is now innately passive for almost all classes with pets. The hunter pet talent has been replaced by [Culling the Herd].