They clearly either didn’t hear what she did to her pets or they’re too far gone to care. My guess is the latter. If in zombie lore, they feast on brains, it can’t exclusively be because of the melt-in-your-mouth squishiness. (I’ve never had brains. I’m a veggie with a direct line to the non-TV show Hannibal Lecter. But they look squishy). Maybe they eat brains to relinquish their own and what the virus took from them. The only way to really know is to have an interview with a walker that will start something like this:
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