One possible moral could be about the importance of kindness. Just like in the story of the sad dog that was bullied, if the other dogs had been kind, the sad dog wouldn't have suffered. It shows that being kind to others can prevent sadness and pain.
Once there was a sad dog in a cartoon. The dog was left alone in an old house when his family moved away. He waited day after day for them to come back, sitting by the window with a forlorn look. His little tail that used to wag so happily now just hung limply. Every time he heard a car pass by, he hoped it was his family. But as days turned into weeks, his hope started to fade and he became more and more sad.
Death of a beloved character often makes a cartoon story sad. For example, in some stories, a cute puppy might die, leaving all the other characters and the viewers heartbroken.
The moral might be about kindness. In the story of the abandoned dog, if people were more kind, the dog wouldn't have to suffer in that unperfect and sad state. It also tells us that even in the face of unperfect and sad situations, there is always a chance for someone to show kindness and make a difference.
Not knowing the actual story, if it's about the relationship between the two dogs, the moral might be about cooperation. Despite their differences (be it color or personality), they can work together towards a common goal, like protecting their home or their owner. And in life, we should also learn to cooperate with people who are different from us.
The movie "Up" has a very sad beginning. Carl and Ellie meet as children, both with a passion for adventure. They grow up, get married, and save up for their dream trip to Paradise Falls. But life keeps getting in the way, and Ellie becomes ill and passes away. Carl is left alone with his memories, which is a very touching and sad part of the otherwise adventurous story.
One cartoon sad story could be about a little kitten who got lost. It wandered the big city all alone, with rain pouring down on it. The kitten missed its warm home and its owner terribly. It meowed sadly as it searched for a familiar face or place, but everywhere was strange and cold.
The moral could be about loyalty. Just like the dog is often loyal to the boy in such stories.
Again, not knowing the exact story, but a common moral could be about loyalty. Little dogs are often seen as very loyal animals, so perhaps the story's moral is that loyalty is a valuable trait.
Well, it might be about companionship. The man and the dog are often companions in these stories. They go through various things together, like facing difficulties or simply enjoying a walk in the park. This shows that having a true companion, like a dog, can bring warmth and support to a person's life.
The moral is that greed can lead to loss. The dog was greedy for more meat and in the end, lost the meat it already had.