We are very lucky to have such go along get along cats. I do think there is something to the bigger cat equals more chill theory that my daughter espouses. But they are just cool with everything.I just do not understand how you manage this.
I adore my cats. They have been together for a half dozen years and they still don't all tolerate each other. I have a few pairings that work but I could never get a nice cozy picture like that.
I don't think my environment is particularly stressful for them - they all seem to live their best lives - they just don't particularly want to do so together!
I am very jealous!