Parents need to know that these '80s cartoons, while mild in many ways, aren't nearly as politically correct as those made today. All the heroes are male, and female characters (and sometimes even minorities) tend to appear in stereotypical guises and minor roles. There is some slapstick cartoon violence as well -- which is sometimes used to resolve conflicts.
Positive messages:In the Marmaduke cartoons, the mayhem invariably results not from bad intentions but from the dog's size and clumsiness. Though Heathcliff responds to neighborhood bullies with violence, he never starts it and insists he would prefer to be friends. Some dated gender roles -- the heroes are always the male characters.
Violence & scariness:Very mild cartoon violence. No weapons -- cats and dogs fight within a spinning cloud of dust, striking one another, etc.