Champions (2023)

In the scene where the actors run into the gym showers and see a mouse crawling around, prior to filming the wranglers transported four individually caged mice to set on a dolly cart.
One of the wranglers removed a mouse from the cage and held a mouse in hands on exterior of the tabletop shower set. The other wrangler sat underneath the set near the fake drain. The fake drain was a hole along the ‘shower wall’ approximately three feet deep.  On action, the wrangler  sat on set and used a buzzer. The first wrangler released the mouse into the shower set ‘hole in wall’ at mark A.

In the scene when the actor walks out of the building and stops to pet the dog on his way out, the set was the entrance to a gym and the street in front, the weather was somewhat cold, but otherwise dry. The dog was filmed being walked on leash past the gym, a young man sees her and crouched to pet her, then both continue on their ways.

Due to limited resources, American Humane Association did not monitor some of the dog and hamster action.