We continue to be very relieved. Decimus continues to cautiously go out to the main living room voluntarily, as it was when I last wrote. Still doing the (behavior plan removed). Decimus no longer hisses or spits at Aesir, although he is vocal: meowing, but is more talking in general it seems, rather than upset/scared. Nights are still their best interactions, when Aesir is in our main living area, tired, and Decimus will wander out on his own schedule, go right up to Aesir, maybe even touch his nose, and then walk away like it’s nothing, or ignore him entirely. My husband and I still can’t believe it! Thank you for your guidance, really appreciate it, this is definitely working! Thank you, Maria R. NYC