mine are trained to go outside or at least i am trying to...but the other day it was raining and i laid down the UGODOG with a peepad inside...and they went straight to it...even the little maltese puppy...
btw if that does work you could take off the grate...and just lay the peepad down...
and when i am not home i leave then in the laundry room gated off from the rest of the house with the 2 ugodog in there...hehe
see video..