Hope this will help when they are outside! This is the one that my Prince uses. I can't remember if it has the opening for them to do their business. If I find the snowsuit I'll let you know. You could also buy the lily boots with the hard rubber surface so that their little paws don't hurt in the cold. Prince also has a heated bed that automatically turns on when it reaches a certain temperature. If I find the link for that, I'll let you know also. We have to get ready for the winter because it's right around the corner.
javascript
pen_zoomwindow('http://www.petsmart.com/global/product_large_img.jsp?PRODUCT%3C%3Eprd_id=84552444 1806935&FOLDER%3C%3Efolder_id=2534374302032061&ASS ORTMENT%3C%3East_id=2534374302023689&bmUID=1126209 677508')