A sequence in the Image Comics series by Robert Kirkman and Toby Moore involved zombies eating an entire horse. Nicotero explained on his AMC blog that the scene had been faithfully recreated for the new show.
"We had 30 extras leaning over this prosthetic horse that we created, and they started ripping its insides and its entrails out and going crazy," he said. "They were sticking their heads in it and their hands in it.
"We made all these silicone guts and entrails and organs. [The] more stuff I put in there, the more excited they were to reach in and start pulling it out."
He also confirmed that each zombie will have an individual look and style.
"[Some] zombie make-ups are a little more fresh-looking, some are a little more decomposed-looking. This is the first time we've ever actually gone through and hand-picked the actual zombies that will be featured.
"It's one thing to glue prosthetics on somebody's face, but if you have somebody who's got a lot of character and they just have a really great structure to their face, it's great."
The Walking Dead - starring Andrew Lincoln and Sarah Wayne Callies - will air in October on AMC.