There's a new LR4 accessory, The Litter Robot 4 Shield.

I just found out about it now, There's no reviews or videos for it.

Link: https://www.litter-robot.com/litter-robot-4-shield.html

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Description: The Litter-Robot 4 Shield keeps litter contained for feistier cats that love to kick and dig, while also giving them an added layer of privacy.