Are these some of Zack's friend?

I just read this article from the NY Times about dogs and them being a "woman's best friend" and it made me hope that they are not just a fashion accessory. Zack wouldn't be caught in a sweater, although Skippy (almost 15) loves his sweater to sleep at night. :) See the link in the left hand column called "women's best friend?" if you wanted to read the article.