[Hillarys Gate Cult]

That’s one glaring plot hole I have to ignore. Just thinking about how fast the skin and muscle around the jaw decomposes compared to the rest of the body would make all of them useless within a matter of days at most. About all they could do would be slow slam dances.

[CatherineofAragon]

Geez, I hope that’s not how “The Walking Dead” eventually ends. What an anti-climax, LOL.

[allmendream]

Zombies seem to desiccate - but not decompose like a dead body. If they were an actual dead body they would suffer rigor mortise and the like.

For the muscles to move (unless magic is somehow involved - and usually it isn't) there has to be some metabolism involved - burning up fat stores, muscles, and potentially anything the zombie has eaten (brains!).

Rage “zombies” (28 days later)are 100% alive - and are more correctly called “the infected”.

The book “World War Z” deals with the zombie infection time limit - but it seemed to be several years of hard core zombie action, longer where they froze over the winter IIRC.