One critique of this episode...just how is it that zombies are still able to smell things?
Well, hasn't that always been the question. We nitpick like we usually do with movies or shows, whereas we happily pick on some character performing in some way we don't agree with, we have a tendency to skip over there are huge biological issues with zombies.
Why feast on the living only? Exactly what does the infection do to the tissue that makes other zombies unpalatable?
How slowly do these things rot? You think all you'd have to do is be able hole up for a month or two and then the zombies are pretty much mulch except for any newer ones. What functions do/don't work? Can they taste? How well can they see? Do they have a sense of touch? How in the heck do they have any electrical activity in their body at all, creating the ability to move?
If they are 'mostly' dead, then that means they are still 'alive' or functioning to some degree and therefore aren't rotting, meaning they can also starve...uh....to death.
My brain hurts now. Yummmm, brains. Oh yeah, wrong zombies.