9 lb male White Chihuahua Puppy

9 lb male White Chihuahua Puppy, 12 weeks old, need a new home for him. He is a small size dog, he is not a large dog. He is a great dog but needs someone who has the time and patients to train him. He knows how to sit, shake paw and is house trained. He needs help with walking on a leash( he is strong and pulls a lot). He needs lots of attention and exercise, I cannot provide the attention he needs, sometimes he barks. He is protective of his family and is scared of strangers at first. He would be best suited for a single individual or couple that is very active and wants to bring their dog with them for adventures. He loves other dogs, and lived with a cat before. He loves car rides and just being with his owner. If interested in my dog please respond and mention a little about yourself and situation. I want to make sure he goes to the right person.