We've only trained our two Yorkies to go outside - never used pee pads. Mabel who is just 3 pounds and 5 1/2 months, starts shivering BEFORE we go out. I've been trying to sew them some sweaters and I think I'll buy them some booties - still trying to find out which ones are the best. Yep, Mabel shivers at the rain, I haven't had the heart to tell her about the snow yet!