I need to know for a project I'm working on at school, and google isn't helping me out. I was to know what was the first movie that actually revolve around an animal character. (has an animal protagonist.)
The Wikipedia entry on Jean, the Vitagraph dog (the second canine film star), claims Blair as the first.
Whether there's an earlier animal star, though, I couldn't tell you.
I'm providing a second answer since A Dog's Love arguably has two main characters, one of whom is human.
Your Obedient Servant, 1917
This was the first film adaptation of the novel Black Beauty, whose central protagonist is a horse. It was a silent, black-and-white film.
This must be one of the most iconic and famous films with an animal protagonist, namely a deer. It was an animated film.
Lassie Come-Home, 1943
Released only one year after Bambi, this is another well-loved classic, whose protagonist is a dog. It may have been (?) the first colour film with an animal protagonist.
I've included more than one film in this answer, since if you're working on a school project, you're probably interested in the history of animal protagonists in films rather than just the first. Also, there doesn't seem to be much information available on the very early ones.