Martians' First Thanksgiving

Periodically, SCBWI offers contests for writers and illustrators. They'll present an idea, and we interpret it. This month, the idea for illustrators is called "Thanks, But No Thanks!" The description: "Ever been dragged to a Thanksgiving dinner against your will? Well, so have the brother and sister duo of your new book. But nothing could have prepared them for Thanksgiving '08. For this month's Illustrator's Contest, show us what your characters are up against at this year's feast."

I wanted to play a little with irony. For these Martians, it is their first Thanksgiving on Earth. However, when they are presented with the golden juicy turkey, they are disgusted. What does a turkey resemble to them? Why would it cause such disgust? (And no, they are not vegetarian.)