I generally have to contend with only two of my three cats. One insists on sleeping on top of the printer/scanner, effectively postponing any scanning I need to do. I do, however, get a dirty look if I print something while she's napping.
No. 3 cat (see my avatar) is a huge, massive, heavy, ultra-fluffy monster mama's boy who thinks he must be held like a baby in order to get any quality sleep. So I sit at the computer, one aching arm full of furry deadweight and I mouse around with the other. This lasts until I can't bear it any longer when I move him up onto the desk next to my laptop. He'll stay for a while and then go off to find the closest basket of clean laundry.
Sometimes I marvel at how tightly wrapped around their little furry fingers I've become. LOL!
Sue