My kittens are 12 days old, and they are in confinement in a separate room with mama. I have another neutered male and two dogs. I have no fears from any of them, the dogs are afraid of Little Miss, mama. So, when is a good time to move them to another more social part of the house, or should I? Should I bring them in one at a time for short periods to let them get to know each other? I know they are way too young now, but I need help with this.