WotLK Pet hissing everytime it spawns

[FrostyLeaf007]

I played WoW for a pretty long time, and I never heard or saw this. Every time I spawn my pet, it makes a snake hissing sound and something red appears for 1-2 seconds above it's head. Does anybody have any ideas of this? What could it be?

[ArchShyman]

I suppose its pet's talent
called Cobra Reflex, passive skill, boosts pet attack speed for continuous attack but at reduced damage