1) Hitler was not an ethical vegetarian, and not even a vegetarian.
It's still
disputed.
2) He also did not protect the rights of jews, so he was not consistent in protecting animal rights. (jews belong to the species Homo sapiens, who belong to the class of mammals, who belong to the kingdom of animals)
In 1931 Hitler proposed a ban to vivisection, and it was enacted when he came to power. He signed a
Reichstierschutzgesetz (i.e. Reich Animal Protection Act) in 1933.