Apparently, "Cats Can Be Jerks."
In another grim reminder of the moral unreliability of our furry pals:
•On TV, Wendy and Marvin were loyal pals of the Super-Friends, aided by their dog Wonder Dog. But did you know...
•In the comics, Wonder Dog was eventually revealed to be a demonic entity and mauled Marvin to death while leaving Wendy permanently paralyzed from the waist down, leading her supervillain father, the Calculator, to vow revenge against the heroes who allowed this to happen to her.
But since they rebooted the DC Comics universe in 2011, we'll never know if that all worked out OK.
And that's one to grow on.