Create a matte painting.
Tie it to your shot with tracking.
This is called a set extension. This tutorial adds a castle to a scene. However you can use the same technique to add “nothing” to a scene to replace your stuffed animals. I’ve done this to remove shadows, or to clean up nasty looking walls behind my actors. In this case your matte painting starts with a single frame from your source footage. Remove the stuffed animals in photoshop. Take only the pieces you need to patch the image, and leave the rest transparent, then bring it in to AE. Follow Andrew’s tutorial.
https://www.videocopilot.net/tutorial/set_extensions/
Cory
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Cory Petkovsek
Corporate Video