Plants don't have to go unless they're on the toxic list, even though you should keep them away from your cat for two reasons: to prevent a sick cat and your peperomia from being attacked. 1. Make sure your cats cannot access your plants by putting them in an off-limits room. 2. If possible, place them up high so your cat cannot reach them. 3. Cat deterrent spray can help you prevent your cat from going near your peperomia if you spray it around it.