That is all fine and dandy.. but if the prisoners heard about it at the same time as the guards very hard to lock down a panicked prison in riot mode.
which since everything Ive read in the TWD universe it happened all very fast.
It just is hard for me understand how a prison full of hardened bad ass criminals, hundreds of them, behind a fence could be taken over by the zombies.
It seems like all the zombies in the prison were guards or prisoners. Only a small percentage were non prisoners. That rules out a roaming hoard invading the prison. Besides if the hoard came and went why wouldn't the remaining prisoner zombies follow the hoard out of the prison.
That means the only explanation is that the zombies spread by infection throughout the prison. But like the previous poster said they typically devour the victim to not leave enough left for that victim to become a walking zombie.
So how did it really spread so fast that the guards and prisoners could not fight off the zombies that were there?
I like my explanation about the government dropping a bomb with some gas in order to experiment on how to kill zombies. They did show the army droping napalm on Atlanta to kill the hoards there.