The pigeon might reunite with its flock in the end. After going through all the hardships and being sad for a while, it manages to find its way back to its group. They welcome it back, and it no longer feels lonely and sad. Another ending could be that the pigeon, despite its sadness, adapts to its new situation. It learns to be more independent and finds new sources of food and places to rest, so it becomes less sad over time.
One possible ending could be that the cheerleader finds support from a new friend or mentor. This person helps her to see her worth beyond her problems, and she slowly starts to regain her confidence and happiness in cheerleading.
One possible ending could be that things turn around for papaw. He could receive support from his family or community and start to feel happy again.
The lizard could also form new relationships with other lizards in the area. It overcomes its sadness by building a new life with its new friends, sharing resources and living happily in its new environment.
Maybe the cat, despite all the sadness, manages to form a little community with other stray animals for support and survival. Or it could be that an animal rescue organization steps in and takes the cat in, nurses it back to health if it was ill, and then finds it a forever home.
I'm not sure specifically as you haven't told the story. But it could be about a pigeon losing its home, maybe due to a building being demolished where it used to nest. Or perhaps it's about a pigeon being separated from its flock.
The wolf could sacrifice itself to save another animal or even a human who once tried to harm it. This selfless act would be a very sad but also heroic ending to the story.
The ending could be that the doge's owner comes back and realizes how much the doge has missed them. So, they decide to never leave the doge alone for such a long time again and give it lots of love and attention.
One possible ending could be that the fruitcake was thrown away in despair, ending up in the trash.
One possible ending could be that the grandpa's family finally realizes how much they've neglected him. They start visiting him regularly, and he slowly starts to regain his old happy self.
Perhaps the sad caterpillar's situation gets worse. It fails to find enough food or is finally caught by a predator. This would be a tragic ending for the poor caterpillar. However, its story could also serve as a lesson about the harshness of nature for other small creatures.