In our house, Charlie stays still for fear of waking the cats. I move figuring that they will come back again. But the REAL problem is not WHETHER to move or not, it's are you physically ABLE to move or not????? Think about it: If you are under the covers and they are on top, we could have as much as 154 pounds of cat flesh holding those covers down! (if all 14 cats, average weight 11 pound, were on the bed simultaneously)