The lion and the bull

I'm watching this film for the first time and am kind of appalled at the footage of the lion fighting the bull. It's not bloody or anything, but by today's standards it comes across as pretty inhumane to stage just for a film.
I suppose it's footage like this which prompted the ASPCA to be on set in future films, while having the disclaimer 'No animals were harmed during the filming of this motion picture' in the credits.

Snakes....I hate snakes