Thanks everyone! Malachi seems to be adjusting. I had him out a bit yesterday since I had cleaned the bathroom I was keeping him in. While the floor was drying, I held Malachi on my lap and he did well. He trembled a bit, but as long as he could see Phinehas, he was ok. He even started to fall asleep! I think I'll be able to let him out of the bathroom soon since he's not always running/hiding when I open the door. This morning he was waiting for me and crying, so that's good improvement. Now we just need to get over the hurdle of Phinehas's health issue, and I'll feel so much better about leaving Malachi out in the main room.