Common themes could include the girl learning important life lessons through her interactions with animals, or maybe facing challenges related to animal conservation. Also, the story might show how her love for animals changes her or the people around her.
Often, such stories might focus on the girl's compassion and kindness towards animals. They could also involve adventures she has while protecting or helping them.
Themes could range from the girl's growth and self-discovery because of her connection with animals, to highlighting the importance of respecting and caring for all living creatures. Maybe there's a message about teamwork when she works with others to save an animal in danger.