- Chet has no eyes, mouth, legs, or arms. However, Chet once showed his mouth and Chet uses his tail to grab things and such.
- Chet loves cheese, and Emmie from Season 5 likes cheese also, so Chet has some sort of relationship with Emmie. In the episode "A Whole Flock of Cheese," Ruff says, "Well, we know who Chet's favorite FETCHer is," and at the same moment there's a picture of Emmie in Chet's "home."
- Chet is smarter than Ruff, even if he takes things literally.
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