Things were calm when I went to bed last night. Both seemed happy and were in the same room without hissing and growling at each other. This morning about 6:15, I was awoken by the screams downstairs. I ran down, and both were hissing at each other. I don't know who did what to who, but Casey went upstairs while I went back to bed after they'd calmed down.

Woke about 9:30, and while they were smelling each others' faces, there was still some hissing (no growling and carrying on this time). I went to the Petsmart a couple miles away from me and got two Feliway diffusers and a 2-pack of refills. One diffuser is in the upstairs bathroom, and the other is in the downstairs bathroom. The bathrooms are in the middle of each floor of my townhouse. Both cats have sensed the new smell, coming in the bathroom smelling the air and then getting up on the sink to smell the diffuser.

There was still a little hissing a little while ago when Casey was smelling Smokey, but things seem to be winding down. I'm planning on brushing them this afternoon, which I'm thinking may help some, too.