I have multiple cats but I have issues with two of them. My youngest cat Reid has been bullying my five year old cat Lana. She’ll chase her, hissing and hitting her. Lana has a perch that is strictly her’s that she’s been pooping in because Reid has been blocking the litter boxes. When I isolate Lana in a room she poops and pees normally in the litter box but when I allow her to roam Reid won’t let her go to the litter box. Has anyone dealt with this? What can I do?