Sara,
Newfs are excellent dogs and are natural babay sitters. They have the best temperment in the world. They love to please, be cuddled, and to be part of the family in every way. Our Bear is hardly ever out of our sight and when he is, he checks in frequently just to make sure that we are still nearby. We take him every where we can and he loves to fish, camp, hike, swim in the ocean, lake or swimming pool, as well as play with others- dogs, cats, and humans. My mother-in-law has several birds and he enjoys watching them. I'll post a picture of him tonight kissing a bird. Its too cute. As for the size, I think Newfs are generally a bit smaller than the Saints in weight and height. Though they are expensive, they are worth every penny and the life that they live with you becomes priceless!