Last night I watched a zombie movie called The Stink Of Flesh... not only was it highly entertaining in that stupid but funny way, but there was a scene where a couple of dudes came up upon 2 piles of zombie shit in the road... one of the piles had a human tooth sticking out hehe.



Also, this is directly from Max Brooks Zombie Survival Guide found on pages page 11 and 12 under the living dead digestion section...

Recent evidence has once and for all discounted the theory that human flesh is the fuel for the undead. A zombie's digestive tract is completely dormant. The complex system that processes food, extracts nutrition, and excretes waste does not factor into a zombie's physiology.

Autopsies conducted on neutralized undead have shown that their "food" lies in it's original, undigested state at all sections of the tract. This partially chewed, slowly rotting matter will continue to accumulate, as the zombie devours more victims, until it's forced through the anus, or literally bursts through the stomach or intestinal lining.

While this more dramatic example of non-digestion is rare, hundreds of eyewitness reports have confirmed undead to have distended bellies. One captured and dissected specimen was found to have 211 pounds of flesh within it's system! Even rarer accounts have confirmed that zombies continue to feed long after their digestive tracts have exploded within.