Hi, I live in North Scotland and though it gets cold, it is usually above freezing point most of the time. It depends on which part of Scotland you are coming home to, but the weather isn't all that bad. Personally I prefer the East side (not so many midges :D ). As JG said, the westie originated in Scotland - in the West Highlands, I presume ;) so they survive very well in our climate. Shorter haired breeds are quite common too, so I wouldn't think there would be a major problem in having either of the breeds you mentioned. In fact I know a breeder in Scotland who breeds both pug and chihuahua. Her dogs are all fit and healthy and love going out in the snow, so long as they get dried afterwards, and can lie near the fire! It's the rain they don't like so much

;)