Lucy: 6 Month Old, Female, Chihuahua Mix, 7 pounds Little Lucy is a young Chihuahua mix that’s learning about the world. She loves playing with her dog friends at the shelter and has been playful towards the cats, too! She is expected to stay under 10 pounds and would be a great partner for someone looking for a small dog. Lucy can be bashful at first, but give her some time and she’ll be in your lap in no time.