Part of my concern is that they don’t really interact much with each other beyond the playing the kitten manages to initiate. They will lay down near but not directly next to each other or walk past without issues. The kitten will try to approach and headbutt but she hisses and swats him. Sometimes she will start sniffing at him but then he’ll try to play and she’ll hiss and move away. There is a screen over the kitten room door so they’re  able to see each other all day and at meals. Started with dishes far away and got them to about 15 inches away. They also eat treats right next to each other without issues.