A Pride of Lions on Set Is Tricky Business
Figuring out the logistics of a movie set which was supposed to be filled with wild animals was no joke. Hedren and Marshall were informed that to comply with the moviemaking standards, they would need at least two experienced trainers per beast. This would mean that they would need around 300 trainers for the 150 animals present on set.
A handling expert suggested raising their own cubs for the movie instead. This was before the Endangered Species Act of 1972, and you could basically order a tiger via mail. As word spread around Hollywood, many predator parents donated generously for the movie.