Is "The Walking Dead" mostly CGI??

I saw one of the zombies arms clip through a fence and it seemed pixelated, am I on to something? or:I saw one of the zombie's arms clip through a fen

I saw one of the zombie's arms clip through a fence and it seemed pixelated, am I on to something?

or:I saw one of the zombie's arms clip through a fence and it seemed pixelated, am I on to something?

or:Duh....zombies aren't real! If there was no CGI, Rick would look like the fat drunk that he is!

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