Ms. Smarty Pants here! Lexi sits, shakes, downs, and rolls over. But her most amazing feat is how long she holds on to a squeaky ball, You don't even have to play with her. She can throw it, catch it, and run with it squeaking all the while. While Lexi is quite friendly we've heard that she doesn't care for other female dogs. She's approximately 19 months old and weighs 46 pounds.