It could be that the dog is on an adventure in the woods but has run into some trouble and is now sad. Or perhaps it's remembering a happy time with its owner and missing them while being in the woods.
The sad man in the woods in a cartoon could be depicted as lost and alone, maybe reflecting on his troubles.
Maybe the dog lost its owner or got separated from its friends. That could make it sad.
The sad story could be about an abandoned old dog. The dog that found it saw the poor old thing with matted fur, skinny and weak, left behind by its owners who moved away or just didn't want it anymore. It's a common and really sad situation for many dogs.
Maybe, against all odds, a kind - hearted person decides to take the sad dog in and gives it all the love and care it needs. This person might see the pain in the dog's eyes and just can't resist helping. So, the dog slowly recovers from its sadness and starts a new, happy life with its new owner.
Rusty might have been separated from his family. For example, if his family moved and couldn't take him along, he would be left in a strange place, not understanding why he was alone. This would be a really sad situation for Rusty.
It could be that the hobo girls got lost in the woods and are now trying to find their way out while facing various challenges along the way. Or perhaps they are there to escape something from their past.
The end might be that the dog's sadness leads to it becoming very ill. It loses the will to live and unfortunately passes away, because the pain of losing its love is just too much to bear. In a more positive way, the dog could also meet another dog that helps it heal. This new dog might be a bit like the one it lost, and through their new relationship, the sad dog starts to feel better and move on from the past love.
The dog's deformity could be miraculously cured through a complex surgery funded by an animal welfare organization. After that, it becomes an inspiration for other disabled animals. It gets adopted by a family who takes it around to different schools and events to tell its story of survival and hope, turning the once - sad story into a positive one.
The sad dog might be feeling lonely or abandoned in the dog house. Maybe it's waiting for its owner to come back.
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.