I may be the smallest but size does not matter

I can take dogs and make them run

I can be as sweet as pie or mean as the devil. When Bubba thinks he is the tuffest I show him whos boss.

I love to cuddle and give kisses. But I also have to remind you that I am tuff so I like to nibble on you too.

I love to have my picture taken. I think I am the cutest.