This is something I've been pondering on for a while now. Over Christmas, myself and OH had to go and stay with my family for three weeks due to family circumstances. As we live in Northern Ireland and my family are in England, we had to leave our boys with one of our housemates, who we gave a strict set of instructions to.
We found out after about two weeks of being in England that he had completely disregarded their feeding specifications of being fed in separate rooms (Archie can't be with Ben and Jerry as it sends his stress levels through the roof, and B&J must be monitored as Jerry sometimes tries to steal Ben's food). Instead, Archie was fed out in the hallway and B&J were fed in the living room, and the door between the two was left wide open, causing Archie's eating to speed up dramatically just as we had got it reduced to a relatively normal speed.
This housemate also favours Archie very obviously, and has done from the beginning. If Ben or Jerry is getting cuddles from him and Archie comes for a cuddle, he will stop cuddling the other boy and start cuddling Archie.
When we got back after Christmas, all hell had broken loose. B&J were bullying Archie to the point where they were attacking him as he walked past them, and they often pinned him into corners where he would hiss his head off and wet himself.
We were able to rectify all of this within a few weeks and now things are completely back to normal, all three will cuddle and snuggle up together like the pals they are, and their rough play is just that, play.
My theory is is that the housemate did something to change the dynamic between them. Jerry is very much top cat, with Ben in the middle and Archie at the bottom, and all three were quite happy with this until we went away. I know cats get stressed when their owners are away but I have never seen it as bad as these three.
What are your thoughts, do you think the housemate could've done something to them, or changed the dynamic between the three? Fire away with your theories!