I don't have or have ever owned any of those three, however, my sister has a pug and a friend of ours has a boston terrier and a frenchie. If I had to chose one, it would definetly be a frenchie. He acts just like a boxer. He is only 14 pounds, but he doesn't take any junk off of Calla. He plays and keeps up with a dog almost 5 times his size. He is adorable and from what I have heard my sister say about her pug, pugs are very hardheaded. I don't know that to be a fact, just what she has told me.
Megan- Hopelessly Devoted to Calla--Brindle female-09/26/04
"To err is human, to forgive, canine." --unknown