I made a new Fort Box for the cats. This time I did not put a hole on the top because it just invites conflict. Instead, I put an entrance hole in the front and a smaller escape hatch on the side near the back. I also put several small peepholes around the perimeter so that the occupant could see if an enemy was approaching.
Naturally, Chris took over the fort which left Frankie on the outside planning his attack strategy.
After a successful defense of the fort, peace was restored in the kingdom . . . for now.