This is a classic. If you know it, I hope you enjoy another look. If you don’t, you might need to watch it more than once to get all the details.
In case you are worried, let me quote a comment:
I’m a movie animal wrangler and FYI animals used on film are treated better than actors and especially crew members.
They are under the watchful eye of the AHS Movie Div. with reps on site during filming.