Air clearly passes through their throats because they do rasp and groan, but they don't need air to survive. Consider the mud zombie that got that girl the Governor was fond of.
On the topic, it makes me wonder if they digest anything? Or would the meat they ingest simply sit in their rotting stomachs?
Everyone poops....except walkers?
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"It's a great day for hockey."
-'Badger' Bob Johnson (1931-1991)
"I see as much misery out of them moving to justify theirselves as them that set out to do harm."
-Dr. Amos "Doc" Cochran
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