We took him in this morning and of course they looked at me like I had lost my mind because he was back to same old normal Guinness

We have kept him with us all day to see if anything happens but nope just being Guinney... After we calmed down and started thinking he was sitting in the same spot Stella would have been on our old couch when she just freaked out growling and tried to attack Guinness which has never happen again... Don't think these two things could be connected but it does seem rather odd.