We adopted a rescue cat named Fluffy about 6 months ago. We slowly got her used to our house and about a month ago we let her expand a bit onto the main level of the house (where the other cats are) they all met previously but they’ve only been out and about all together for about a month.
1 of the 3 original cats (Ben) is having territorial issues with Fluffy. He is obsessive over her. He follows her, stares at her, chases her, corners her, and just doesn’t seem to want to stop. She minds her own business but he always finds her.
We’ve gotten extra litter boxes, extra perches, separate feeding areas, feliway diffusers, everything we can think of. But Ben won’t let up.
What can we do?