It isn't just reiki for my cat and me. Every time I meditate or do anything with energy at home, the cat will come find me and insist on a lap. Even the half-lotus eventually cuts off circulation and i have to be careful about standing up afterward under normal circumstances. With the cat on my legs, and he weighs 17 pounds (8 kilograms?) so he can do a lot to detract from the experience. For some reason, he will stay and go to sleep the whole time if I let him, but he does not like receiving energy directly. He will get up and go to sleep nearby, out of the way. My guess is that cats do not have the ability to limit the energy they take in, the way people usually do. It seems like a mean way to me to make him move, but if he finds the door closed it upsets hit more.