Things are even better today. There was no fighting or commotion last night. While getting around for work this morning, Casey and Smokey would occasionally smell each other, only briefly hissing once that I saw. When I left for work, both cats were happy and relaxed. I got home, and both were next to each other at the door waiting for me. When they turned to let me in, Smokey rubbed his side against Casey. Both were happy and purring up a storm. Shortly afterwards, Smokey was going by Casey and rubbed his side against Casey. So far, everything has been quiet with no signs of trouble.