In the scene where the actor picks up a mouse and injects it, the trainer carried the mouse to the set in a small transport box with paper bedding. Prior to shooting, the trainer took the mouse from the transport box and held it in his hands. The vet applied tape to the mouse’s body, on the shaved area, with the adapted cannula placed under the tape, so the cannula looked like it was inserted in the mouse. The injection luer pipe protruded out from under the tape. The white paper tape was loosely wrapped around the ribcage of the mouse. The trainer placed the mouse wearing the cannula into the actors hand. In the scene, the actor pretends to inject a liquid into the cannula on the mouse. The actor then places the mouse back into the Viv and closes the door.
Once the shot was done, the trainer took the mouse out of the vivarium and placed it back into the transport box.
In the scene where woman walks into a room with a cat in a carrier and placed it on a table, the cat was transferred to its transport box within the trainers van and carried to set within the crate by the trainer. At the set, when the cameras were ready to roll, the trainer transferred the cat from the transport box to the props carry crate. As soon as the shot was achieved, the cat was transferred back into the transport crate by the trainer.