Mobs inside a cage

[Mylifesuxito]

hello there well im just have a question for example this mob.

Enraged Panther --> http://www.wowhead.com/npc=10992

is in a cage, but from outside i can selecte him and attack him without the need to open the cage with the key.

so my question is how i make him not attackble from outside and when the cage is open can be attackble.

i search about the unit flags but if i set mob notattackble well is not attackable after u open the cage. some help

[tortosterone]

it needs a script (or work on a script) from scriptdev2. opening the cage makes the panther attackable.