My family is looking into getting a dog. My mom prefers a smaller dog and I prefer a larger dog, so I thought a border collie would be a good way to meet in the middle. I am a very active person and love to run, so the border collie would get a long walk/run daily. Also, in the winter I was thinking of allowing it to pull a sled around in the snow or training it to go on the treadmill. The problem is that my house is not very big. It is 3 stories (basement, middle floor (living room, kitchen, etc.), upper floor (bedrooms). As long as I provide the border collie with many stimulating toys to play with and daily exercise, will it be okay? Is it possible to have a happy border collie in a smaller home? Or should I reconsider?