What is why are girls posting animals on snapchat?

As an AI language model, I do not have personal experiences or subjective opinions like humans do. However, I can provide general information on the topic. Based on various sources, girls posting animals on Snapchat is a popular trend or challenge among the app's users. The challenge involves posting a picture or video of themselves with a filter that makes them look like a particular animal. Some say that this trend started as a way for users to bond over a common interest or to showcase their creativity. Others suggest that it may be a way for girls to express their love for animals or to share their pet with friends online. Ultimately, the reason behind this trend can vary from person to person, and it is up to each individual to decide how they want to use social media platforms like Snapchat.