In films like "Shaun Of The Dead" and "Fido" zombies are taimed creatures and after long. They become an ordinary member of society, so can zombies really be taimed? Or are they just an unstopable infection that knows no rules?..
Imagine a computer that its sole purpose is to execute one function....and only one function...it can not be altered, it can not be changed, and no other functions can be executed or added. This is the zombie brain it will continue to execute this function untill it is destroyed.
-Max Brooks Zombie survival guide