At about 3 wks, I convert my 4 X 5 foot pen to a 5 X 10 foot pen I use one end for papers and the other a Kuranda bed and a blanket they take to going on the papers very quickly

also, at 7 weeks - they all start to be crate trained if I have room - 1 pup to a crate, if not 2 pups to a crate amazing how quickly they learn to hold it til AM