Did you eat any rooster...?

What does someone mean when they ask "Did you eat any rooster this morning?"

Corn flakes??

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No doubt, although something else came immediately to my mind. Then again, my mind is a sewer, fit only for the pigs to play in.
SS

my mind is not quite so sullied, but I too did not immediately think of the Kelloggs brand.

L

Well, I must be pure in thought, word and deed because that did not occur to me. The phrase does specifically mention morning, strengthening the corn flake theory.