In stark contrast to the user's query, the German language also has a famous, wholesome phrase about a "Tier": (The Little I Am Me). This classic children's book by Mira Lobe has been a staple in Austrian and German kindergartens for decades. In the story, a colorful, unidentified animal goes on a journey to discover its identity, asking other animals what it is. This beloved tale is a powerful reminder of the German language's ability to explore profound concepts of identity and self-worth in a gentle, age-appropriate way.
I should also check if there's any other media with a similar title. There's a movie called "Tiermutter" (2019) by Margarethe von Reznicek about animal rights. That could be another angle. The user might be referring to the movie's full version, but the German title doesn't match exactly. Ich Bin Eine Tiernutte Full Version