- Crossland High School's Science Exhibition in the Diary of a Wimpy Kid Online version. Greg said it was "lame" and Rodrick thought he was robbed when he got home because the person who did it put very little effort into it. All he did was write the name of the Ferret and put its picture on the cardboard and writes what it eats on the front. The near ending of Diary of a Wimpy Kid: Hard Luck in the storage room (page 201), the 3rd shelf (from top to down) the first project says "My Ferret Milky". The project looks different from Diary of a Wimpy Kid: Hard Luck and the online book.
- Greg refers to the owner as "the guy who won it all."
- The project claims that Milky eats lettuce, raisins, and bananas. In real life, ferrets are carnivores; in fact, raisins are toxic to them.
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