Near the end of the Chicken Island West stage, there is a hidden cave on a cliff wall just above the ocean, specifically just near an outhouse, that can be most easily accessed by hovering down into it with the Chicken Suit. Inside the cave is a shrine with four torches, and in the center a portrait of an "Apedog" (a dog with a chimpanzee's head) with the caption "eatpoo" in lowercase lettering just below it. This is a tribute to a now-defunct online art forum called EATPOO, which one of Avalanche Software's developers frequented at the time, and of which Apedog was the mascot.